Piaggio Zip Malossi 70cc Cylinder Kit Install & Tuning - Scooter Street

[@assieblazer7802]

best tutorial i have seen in years great work!!!!

[@scooterstreetau]

Thanks for your appreciation👏😊

[@mleon592]

My fav part is they aren’t using torque specs, I never been a fan of them 😂 always though who cares if it’s for my scooter

[@MrWhiteamin]

You guys make a great instructional video, it was just a pleasure to watch! ☺ I'm 66 and still fiddling about with scooters and other two strokes, mainly veterans. But my son has a Zip that got scored, so he's putting on the same Malossi sport cylinder. Already had the same exhaust, Leo Vince. So he was over the hill when I sent him a link to this video.. A very professional video production, and you blokes are entertaining. Thanks !

[@scooterstreetau]

Thanks MrWhiteamin, appreciate the kind words mate👏 The Zip is an amazing little scooter, heaps of fun for street riding.

[@troybrown6218]

62 and still love building fast 2 stroke scooters

[@dasrusse1030]

I've been pretty experienced tuning small 2 strokes with manual gearboxes. And I got myself my first ever scooter a couple months ago and it's been really hard for me to tune my rollers, clutch bla bla. This video is definetly very informative about how this stuff works. I am confident that I again can take upon the challange and get this thing running like it should.

[@scooterstreetau]

Go for it! Test and learn, can't go wrong. Be warned, once you start it is hard to stop tuning.

[@brettweinmann9154]

Two true professional's, great video footage and extremely well explained. Well done guys

[@scooterstreetau]

Thanks Brett🙌 awesome comment!

[@mylesyeoman7799]

The inlet plate in the carburettors mouth (brass plate) is not a restrictor, it’s actually serving its purpose delivering air flow into the right areas of the carb through the air holes. Often people believe it’s restricting the flow of air, but after performance parts get the jetting right with this little plate still in you will be onto a winner👍🏻 try with and without you’ll notice the sharper response and reliability from keeping the plate as is

[@scooterstreetau]

Thank you, really appreciate your experience... keeping it in does give better fuel consumption👍

[@charduff]

Guys, massively appreciate the video. It was so comprehensive and I came out with a whole lot more knowledge. Thank you so much and I wish you all the best.

[@scooterstreetau]

Amazing to receive such a complimentary comment, thank you Charles. All the very best for you too👍🦘🦘

[@LarryPennington-no1qx]

​@@scooterstreetauuu7

[@SalttooCS]

Great video, really shows how to get the work done!

[@scooterstreetau]

Thanks Salttoo.

[@jordymeulenberg2586]

i have been struggling with my vespa sprint for a while i normally only work on classic scooters but now thanks to you guys i found a couple of my bikes problems and got some really good tips. thank you so much!

[@scooterstreetau]

Really good to hear this. We struggled for many years trying to pioneer solutions to the many problems these little scooties present.

[@gi_bnv]

NO WAY! I never been so proud to be italian like today hahah. Well done guys, it's so satisfing that Zip is loved till Down Under. I'm now subscribed :)

[@scooterstreetau]

What a beautiful comment! Thank you Giuseppe Bonaviri. We love Italian Scooters in Australia🛵

[@gi_bnv]

@@scooterstreetau this is one more reason for me to come there 😁

[@johanbasten7721]

Reminds me of the old days. One day i walked up to the nearest motorshop i always got my stuff. Walked up to that guy and asked him that i was looking for a Polini EVO 70CC for Piaggio. Back then the kit to have (15+ years ago or so). I saw his eyes grow and the next thing he said to me "What the Heck do you need that Kit for??" i imediatly realised i was not going to get that Kit at that time. His reaction on my question was priceless, something i have never forgotten. :) At some point i ended up having the desired kit and it was great fun. Just dont get caught when you run it in the streets.

[@scooterstreetau]

Good story Johan, 15 years ago only Scooter tuners would have known of these parts😜. The first time someone asked me if I had any Polini stuff I pointed towards the fruitshop down the road.😂

[@paulbudford]

Great feature length episode guys. Looking forward to seeing more similar content. Who doesn't love changing clutch springs? 😂

[@scooterstreetau]

Paul, thanks for the support :) More Vids in the pipeline.

[@minombreesprince3228]

Does this kit change your auto transmission to manual?

[@Gt-tp5zc]

This is the best most clea,r concise instructional video i have seen on my bike. Its told me everything i needed to know in less than an hour. Thanks guys.

[@scooterstreetau]

So cool, thanks Gt 6. Glad it helped🙌

[@Pp-sf6ws]

Thats the most cleanest zip 2t i have probely ever seen in my life . All the other ones got damage or are customized. That exhaust is pretty good though. Would not have expected that.

[@scooterstreetau]

Yes it was in new condition and all original. Very rare indeed.

[@StanGlasius]

you havent been to the Netherlands yet haha. Pure machines here

[@Pp-sf6ws]

@@StanGlasius well hahah i live in the netherlands😂 and yess we do have some but not like this one. We do have very tuned ones indeed

[@StanGlasius]

@@Pp-sf6ws ja dat dus hahaha gekke 180 zippies vliegen voorbij

[@Pp-sf6ws]

@@StanGlasius exact😂 vind het ziek. Maar ook wel jammer.. mis die full 70cc zippies ook wel

[@aqua5325]

Well done guys, super happy with all of my purchases and support

[@scooterstreetau]

Thanks for your support! All the best.

[@markinas2004]

Love these videos guys, please do more projects like this!

[@scooterstreetau]

Thanks for your support Markas, we try to keep the videos coming.

[@homelessdrifter9508]

the "emission controller" is actually there to provide a certain amount of oxygen in the catalysator that is in every single stock pipe in european bikes, and theres a check valve so that the exhaust gasses dont go into the variator case or where ever the pipe takes the air from

[@Dreadnought9411]

Excellent ! ...well done ! 👍

[@scooterstreetau]

Thank you👌

[@ljmini732]

Thankyou guys for a great video, step by step was great and seeing the work being done is great. many thanks again.

[@scooterstreetau]

Thank you for supporting our Channel, Glad you enjoyed it😁

[@neman8986]

does the piaggio zip have the same engine as the aprilia sr50 2019?

[@scooterstreetau]

You probably noticed apart from the water cooling system on the SR50R, the base of the 2 engines are the same. You will notice between the Piaggio/Aprilia 2T models they look the same but each model has a different transmission length to accommodate the rear wheel, this includes each model running a different belt size to connect variator to the rear pulley.

[@scooterstreetau]

I believe 2019 SR50R has the new Euro 4 emissions system also, which uses a different carburettor, stator, coil and CDI/ECU. It also has the larger temp sensor on the head, and the solenoid air valve for the electronic control of the carb.

[@jaredpursey3791]

@@scooterstreetauwith the length difference would it be worth sourcing the longer transmission to help with wheel lift?

[@scooterstreetau]

Yes if that is the goal.@@jaredpursey3791

[@kenjuicekrajewski9577]

Great videoes and work ive been races kx 500s quadzillas and turbo street/street bikes for 30 yrs now and im loving these little 2 stroke rippers and builds i may sell two of my big bore bikes and get 5 more of these 2 strokes i just picked up a yamaha qt 50 and a yamaha riva lol

[@scooterstreetau]

Glad you like our videos, thank you for watching and your comment. The small 2 stroke are too much fun, it feels illegal😂

[@usanian83]

Wow had a severe case of nostalgia kicking in watching this, i’m from belgium and almost 38 but was doing the exact same thing since i got my first mobilette called the honda camino at the age of 16 , ended up going to school learning all of it and not just placing parts etc, now after 2 strokes i suffered at 34 wich paralized my left side so its kind of hard to watch without feeling the pain of damn the days where i was ok but it feels great!, you got yourselves a huge fan!, in my days it was either the dick ring or just dick for the exhaust🤣 how are the laws on tuning scooters in australia? We had cops stopping you randomly where they were standing near a random road with a portable speedometer to check 😫 they confiscated it to give you permition like a month or god knows how long to pick it back but with all the illegal parts removed for you by their own pissed off mechanic if you catch the drift lemme go check your ig out peace!

[@scooterstreetau]

Gday mate and welcome, Great comment thank you! See you're never alone😁😂.In Aus we do not have these rules, the country only adopted emissions rules 12 months ago.🦘 Wow and the Cops remove the parts? Hard core.. Over here no such thing, only speed and Hooning laws. All the best🛵🛵

[@davej9929]

Excellent, knowledgeable, concise video.

[@scooterstreetau]

Thank you🙌

[@LucaFiltroMan]

Just to be fair, I have enjoyed thoroughly the video and brought fond memories back :) Just to point out when you talk about "this isn't ideal to go super fast" perhaps you ought to know that there is a quite active racing scene where these little buggers go up to 160 Km/H

[@scooterstreetau]

Thank you, and yes we are aware of the Zip race series. Are the race Zips the SP water cooled version? This one is air cooled base model version.

[@LucaFiltroMan]

@@scooterstreetau Absolutely correct, the SP is the water cooled one, but to the best of my knowledge it should be possible to convert any version to liquid cooling: the only hiccup would be with the clearances in the leg shield trim, as there's a storage compartment that would interfere with the radiator's positioning. For the sake of honesty though, I'm not going to vouch about the accuracy of the info, it's something I recall from when the SPs where just hitting the market in Italy some 10+ years ago

[@scooterstreetau]

@@LucaFiltroMan We have done this conversion. We took an air cooled Zip and fitted the Radiator with electric water pump, cooling hoses and the water cooled racing cylinder along with many other tuning parts. We also changed the front panel and fitted a genuine SP front cover so the incoming air could meet the radiator. The performance was as you described, Ridiculous power!! This was an expensive project... We lalso did the Superman theme custom paint job and it did fly🤣🤣.

[@multilecful]

Jeez boys, I had my fist in my mouth whilst you were torquing that head down. Great video.

[@scooterstreetau]

All for the love of scooters😉

[@Pasteria8]

Thanks brother! Im almost there! I got my sip running lile a beauty with this video and i have never touched a tool before. I cimmented before and you answered. Im lamost there brother!! Messing around with weights i have 6.5g at the moment. Think i will try 6g and contemplaining to put the malossi fly clutch with bell on.

[@scooterstreetau]

Great stuff, very happy for you😆. Note: The lighter rollers will allow the engien to rev easier but go too light and you will loose pulling power through the mid range. Fitting a clutch or fitting tighter clutch springs will make a positive difference to the rpm build and the initial acceleration.

[@Pasteria8]

@@scooterstreetau im so happy for your existence and that you made this video 💯❤️ you helped a man on the other side of the world literally 🙏🙏🙏 Ill put in the clutch tomorrow and i will order some new clutch springs and some contrast spring? I thinks its called 👍 anyway big big big love 💯❤️ If you were in Sweden i would fuggin hug the shit out of you brother ❤️❤️ keep doing this kinds of video and i would love to see some more build from you guys 🤔 sorry for long comment but you really saved me, my man 💯💯💯🙏🙏🙏🙏😇😇😇

[@scooterstreetau]

😂😂That is awesome, the reason we make this channel and you are a perfect example🙌, We have great success with the polini clutch, it is adjustable and aloows fine tenson adjustment.@@Pasteria8

[@Pasteria8]

@@scooterstreetau i only need to build hangers for all of my pipes to try out now, stage 6 mk1 , laser x pro and a gianelli reverse. De build hangers take longer time then anything else 🤣 But yeah! If anybody reads this! Go for it! This video is a very very very good tutorial on how to do stuff! Only thing is that im lefthanded and assume the guy in the video is right handed bcuz of sometime when he said do from this side cuz easier angle, sometime is opposite if you are left and its possible from the other side, just a side note 😅🙏 Thank my brother from AU 💯❤️

[@Pasteria8]

I have the stage 6 pipe on. I have 70cc malossi sport i have malossi fly clutch and 6g rollers. What is the final steps now to get it adjusted right?

[@EnergyXyz]

There are two types Dellorto PHVA 17,5 models. A modified "low emission" type named "OD" with a fat needle, smaller cut away and different needle jet (emulsion tube) The other one is the "normal" one named "TS. Thats the one to go with. Much more easy to tune in, especially in the middle range.

[@scooterstreetau]

Thanks EnergyXyx, this is great information🙌. There are more than 11 PHVA in 17.5mm range. Parts change between them such as the slides, needles, atomisers, jets and so on. Heaps of info on Dellorto Uk website for anyone needing.

[@EnergyXyz]

@@scooterstreetau yes there are so many models, but just stay away from the bad Euro4 - OD models. The good ones often comes with A20 needle and a 40 degree cutaway throttle slide.

[@scooterstreetau]

Thanks for sharing🙏@@EnergyXyz

[@unkwnas]

this tutorial is so good!

[@scooterstreetau]

Thanks mate👍, positivity rules🙌

[@frankie5341]

So wanted to see it go after all the work, best vid ever thanks.

[@scooterstreetau]

Haha yes sorry. Thanks for the support ☺

[@Satown210]

Great pace and nice detail thanks

[@scooterstreetau]

Thank you👍

[@wedthurfri]

what a great vlog, love it

[@scooterstreetau]

Thanks so much for the comment, all the best👍

[@henryhaxby9283]

Great video guys. Thanks from the UK, please let me know if you had to move the needle clip.

[@scooterstreetau]

Hey thanks henryhaxby, see the description for the tuning points. we start with needle clip in middle position and we leaft it in this position.

[@generalr6398]

you guys are freaking legends! awesome vid!

[@scooterstreetau]

Thank you for the great comment and for the view👋🌟👌

[@generalr6398]

@@scooterstreetau no problem at all. I just got a zip and have purchased a few products from you. I hope I got the right ones. Just going to do the rollers, jets, clutch springs. Got a Leo Vince off a friend too. Was going to hold off on the 70cc kit for now to save some money. Hopefully it all goes well.

[@scooterstreetau]

@@generalr6398 Ok thank you, use the vid above as a guide..

[@Pasteria8]

This titorial made me have the balls to buy a 70cc malossi sport to my Piaggio zip 02 2t... Finished it yesterday and tried it on today. I listened to my friend regarding to the jet, he told me mid 90s but i habe a 96 now and i cant even lile gove it more then 1/4 of gas before it starys to like blurr and lost power . I will try a 88 jet tomorrow. And also order a weight kit. I already have a jet kit. I also have a malossi fly clutch with bell i have to put on. But thinking i had to run in the new malosssi cylinder first? Thanks for this video much appreciated ❤❤💯💯

[@scooterstreetau]

Well done! and a great achievement to have a go, I am sure it will be a success. With the basics, only ever change one part at a time, cylinder first then a quick start, then start the jetting. Start at your 96 and then move down to the 92-90-88 and when it becomes clean on throttle go back up 1 jet and ride it for a fuel tank and then retune. Yes you will notice the revs and movement may not be at their peak so leave the rollers and just add tighter clutch springs or the Mal clutch. and then again test ride and let it settle, adjust as necessary. Then repat with the next part and so on🚀

[@BeauuSB]

Best tutorial on youtube

[@scooterstreetau]

Thanks Beau😲👍, glad you liked it.

[@nastynatesscooters9896]

Great video!!! Like the finished bike!!

[@scooterstreetau]

Worked out very nice for the owner, thanks for the love😉

[@cippanello]

my zip mk1 have top tpr and the squish at 0,7 goes great.Nice video

[@scooterstreetau]

0.7, very good👌 and thank you.

[@scooterstreetau]

Please support us and SUB..'

[@paulholmes1181]

putting this this kit on my gilera ice and watching the steps as I do it, you guys have done an amazing job very easy to keep up with, I'm putting on the malossi flip exhaust and a dellorto 19mm carb and multivar 2000 variator kit. do you mind of I imbed this video onto our forum? cheers from nz Terry

[@scooterstreetau]

Thank you so much! The extra parts youn are fitting will be on another level. Yes please go ahead and link the forum. We are trying to get more SUBS and views, much appreciated.

[@leandro23_]

Nice video guys thanks, i recently buy a zip 2t stock!

[@leandro23_]

Where is the serial VIN?

[@scooterstreetau]

In the glove box.

[@scooterstreetau]

Good choice! Great place to start, 😍 ZIP

[@charliejohnson2065]

Perfect video easy to understand explanation, I’m looking at modding up my tnt Roma 2t I believe it has a Yamaha 2 stroke, would these parts (mainly the exhaust and cvt parts) be easily compatible with it? Thanks!

[@scooterstreetau]

Glad it helped and appraciate the veiw and comments🙌 The Roma is Minarelli based (Yamaha) so look for these parts. There are many around.

[@levijensen7681]

Great work lads!

[@scooterstreetau]

Thanks Levi, glad you enjoyed.

[@clivesilk3501]

my 2006 zip doesn't have an emissions part fitted ... i like your upgrades !!

[@scooterstreetau]

Yes the early Zip was PURE. Thanks for watching🙌

[@Barbarossa010]

Great vid Guys💪💪 i have a zip SP 98 model with 180 2stroke Piaggio engine swap great job im from Netherlands ❤️much love💙

[@scooterstreetau]

Thank you! That Zip of your would be very satisfying..wow.

[@Barbarossa010]

@@scooterstreetau yes in deed my friend 👍 kzbin.info/www/bejne/in26pmloha9gm6M

[@bernardwitczak]

That small intake pipe for air come true I would not takeout from air filter otherwise I difficult adjust airflow and the carburetor hasn't worked properly.

[@scooterstreetau]

It works very well for us👍 but you must adjust the carby tuning.

[@antonywragg2756]

Great video guys, im just about to tune a zip myself, did you guys remove the restriction from the exhaust on this setup?

[@scooterstreetau]

Tahnk you👍Yes.

[@callum14p]

Hi there, back again we finally fitted the parts to the scooter. Malossi variator with 7.5Gram rollers and added yellow clutch springs as well as the yasuni exhaust. And a malossi air/sponge filter Fitted a new carb as well as the other one had been abused and the thread on the main jet had been stripped. Took it for a ride out yesterday and acceleration was weak and top speed to 60 kph. Also main jet size is around a 65 jet according to the box on the new carby. This wasn’t good enough so had to swap the main jet to a 78! And this seems to have helped ever so slightly. On this video you were getting 80kph with very similar parts. What do you think I’m doing wrong? Hope you could shed some light on how I can fix the slow issues. Appreciate your knowledge Also tipped for a coffee guys hope you received it

[@scooterstreetau]

Hi Callum, Thank you so much for the Coffee, so appreciative. What Yasuni? Z or R? Did you derestrict the exhaust? Move rollers to 5.5 gram. then move up or down in weight as required. 5.5 may be too light but you will know first ride. Let the carby warm up so it is not on choke. ride for 3 minutes then tune and judge. D you have a 70cc kit fitted?

[@callum14p]

@@scooterstreetau hey guys, it’s a Yasuni R that has been derestricted. Ok will try the rollers. Bike has always been running a few minutes before taking it out for a spin. It’s still a 50cc on the scooter for now. Thanks again

[@scooterstreetau]

@@callum14p Ok, the Yas R needs very light rollers with a 50cc kit, give it a go and let us know 👍👍

[@matthewnorris203]

Honda Bond. On everything. Hi from the USA 😅

[@scooterstreetau]

Hey Bro🙌

[@mudachuka12345]

Enjoyed watching the video Iam wondering how much of the performance increase was down to derestricting the carb would like to have seen this before fitting the exhaust.

[@scooterstreetau]

Thank you mate👍. If you derestrict the carb only there will be no noticeable gain, due to the balance being over weighted with air. In effect you are giving too little fuel. We want an increase but a balanced ratio of fuel and air. Thanks for the SUB🎅😎

[@domciau]

Very nice video

[@scooterstreetau]

Thanks Dom, appreciated🤙

[@bikeboys6000]

Best tutorial ive ever seen i think lol

[@scooterstreetau]

Ah thank you mate, support is appreciated🤘

[@joelivesey5353]

Brilliant video. Am after a bit of help with my zip my set up is stage6 70sport kit Stage 6 variator with 5.25 gram rollers Leo vince black edition race pipe 19mm carb with a 95 size jet malossi gear up kit standard crank and standard clutch set up the needle setting is 2nd from bottom standard reeds with a bigger inlet manifold the thing is the engine is spluttering on set off but as the revs build up it seems fine and is very quick. Any help would be much appreciated Cheers

[@scooterstreetau]

Thank you Joe🙌 Let the engine warm up to operating temp before making a judgement on the tuning. Is it auto choke or manual choke?

[@lunzhPS3]

I have a yazuni r exhaust on my zip with malossi cylinder kit 70 and malossi clutch and variation kit. I have a 17.5mm carb with 70 main jet. I'm not worried about top speed as much just want quick takeoff. but when pulling throttle it takes a full turn and 2 seconds to Start off. and starts off slow. would u say this is a rollers issue or clutch springs? or anything else. btw love the videos wouldn't be able to do my setup without u guys

[@scooterstreetau]

Thanks for the love👍, Try 6.1 gram rollers and use the Polini clutch if you can. The delay is due to the clutch spring, and it needs delay to build rpm before engaging for faster acceleration. It the exhayst derestricted? Use a large jet (Tune carby) and fit a pop stuffer in to the air box cover. Lets get the rpm really high so it can be delivered to the rear wheel.

[@pat94290]

beau travail mais vous ne dégagez pas la pompe a huile?

[@scooterstreetau]

Merci de noter cela, nous retirons toujours l'extrémité finale du tuyau lorsque le moteur est au ralenti et vérifions que l'huile circule jusqu'à l'extrémité du tuyau d'huile.

[@jenny-masterchef]

make a few runs then check sparkplug readings again.but it looks ok,porcelain parts should look almost clean.ofcourse listen to the engine.im using polini cp 17,5 carb mj 80 with naraku 70 ,stock exhaust which i need to upgrade.stock airbox with malossi foam filter.ofcourse the mj setting depends of the airbox size too.

[@scooterstreetau]

Nice! This scooter is still going well after 4 months.

[@nastynatesscooters9896]

The zips are very nice you don’t see them in the USA often I bet they would sell fast here

[@scooterstreetau]

They would have been a huge seller in USA.. Very popular in all markets.

[@krazed0451]

If you drop a circlip in the crank, a magnet on a stick is your friend ;-)

[@scooterstreetau]

Good tip👍🦘

[@taylorsadventures6585]

Thankyou so much lads helped me alot !!!!

[@scooterstreetau]

Awesome, great to hear..

[@axiglow6777]

Well actually when u upgrade ur motor and motor parts u have more power so actually you should put less stiffer springs on the clutch cause the motor has more tork and doesn't need to stard reving verry high before clutching the wheel just so u guys can know

[@scooterstreetau]

Hey Alixglow, whatever works for you and what your riding style is, so go for it. Good to hear your comments. We would apply a stiffer clutch spring set to delay the engagement of the clutch. Some of the race brands have designed a HIT clutch which allows the rev to build and then the clutch will engage to boost the initial acceleration. If you have less tension on the clutch springs the clutch will be engaging at idle, have seen this many times before.

[@andru9102]

Really interesting video, watched the whole thing. One question (which I couldn’t find in other peoples questions), would it be the same process for the Vespa 2 stroke 50cc? Thanks and greetings from UK

[@scooterstreetau]

Hi, and thank you. Yes the Vespa 2 stroke and the Zip 2 stroke are the same engine..👍

[@snwman51]

Hi guys. Love your work. What’s roughly the cost of the pipe and clutch/roller upgrade for a TGB 50? Cheers

[@scooterstreetau]

Thank you very much🙌. Approximates.. Pipe $300, Clutch $130, Rollers $30. Check out the TGB page on the Website. www.scooterstreet.com.au/product-category/others-50cc/tgb-50/

[@ryanlowe920]

Doing a similar build this week! Unsure if to get a new cast iron kit or a mhr kit second hand but it has a brand new piston with it

[@scooterstreetau]

If the MHR is in very good condition, value hard to pass on that.. if a first build go for cast.

[@MrBerenguer67]

Thks four your excellent job I have a Piaggio Zip I like to fix a Malossi 70cc kit on I have a Sp3 Liovince exhaust de restrict can you please let me know whitch carburettor jet size is work better thank you very much

[@scooterstreetau]

It would be somewhere between 80 and 90. You need to get a range of jet sizes (jet kit), start at around a 90, test ride, reduce to the next size down, repeat until the bike runs cleanly. Taking a shot in the dark on a jet size is very commonly the cause of piston seizure.

[@oliverfuchs4357]

With gearing 15/38, all the other mods except DR evo (2 foot gaskets no headgasket) and Sito exhaust you can do already around 105 GPS after some slight mods to Exhaustport and Reedcase. I think your setup is far from optimised.That exhaust also kinda screws the powerband the Mallossi sports likes.

[@scooterstreetau]

Nice to hear👍👍

[@V.Andersen]

when i put on the exsast and the variator kit with a 72 in the carb it almost dosent go forward. what can the problem be

[@scooterstreetau]

Your issue is very common, you have not made all the required changes to the engine. Go back to the start, remove all the parts and fit only the Variator first and then test ride. If all is OK then move to the next step. When we fit an exhaust you should watch one of earlier videos to see what other parts MUST be changed to get satisfactory result. Also watch the clutch springs set fitting video. This video will help for the exhaust part of your project. kzbin.info/www/bejne/oXfVYaGtjctnapo&ab_channel=ScooterStreet

[@randymarius1678]

The best video. You are the best! But tell me, at a 2001 Aprilia Sr 50 AC I manage to do it on the street combining with a 70 cc Malossi engine set, with an RMS trim ?? Thank you. hello from Romania.

[@randymarius1678]

crankshaft RMS

[@scooterstreetau]

Yes you can do it.. Thank you for supporting us👏

[@jarikinnunen1718]

48:00 Air intake resonaces mean lot. Right lenght is very important. Only way to find it is testing.

[@scooterstreetau]

Yes...

[@YBR_1]

Please do more like this. Also could you do a wheelie build on a zip or another scooter

[@scooterstreetau]

Always trying. Time is our Kryptonite.

[@freeair7292]

Great job!

[@scooterstreetau]

Thank you Air Man🦘👍🦘

[@felixsiglreithmaier2920]

Great video! Just one thing: I personally would never never use an impact wrench directly on the crankshaft

[@scooterstreetau]

Thanks Felix, Good advice. Preset your tools it saves time and pre loosen nuts for the flow of the video.

[@fredschuttenbeld4571]

Nice basic instructional video. I would definitely expect some higher speed for a 70cc vs. the 50cc modification you did. The lack of more speed is probably caused by some breathing issues due to a too small carb for a 70cc. I would install at least a 20 millimeters. The smaller carb explains probably the good (bodem end) torque due to a higher air velocity through the carb/intake manifold. But at the top end, it is suffocating (like the restrictor plate did for the 50cc). Also, a simple detail, when changing the reed valves. Cut the little bolts so they don't protruding into the reed valve cage. This brings me to the next point. Always check if aftermarket parts match to all the other parts and not blocking or obstructing any flow, like gaskets blocking transfers or if exhaust flange matches the exhaust port (you be surprised!). Always measure if everything is up to spec, like ring gap, piston - cylinder clearance, etc. Balancing and blue printing is more effective than bolting exotic parts to it. Last but not least! Oil that beautiful filter with (good) filter oil! Protect that investment (the 70cc cylinder). That coarser filter, untreated, will let more dust through. Filter oil on/in a filter doesn't block the filter flow but makes the fibers sticky, so it even traps the finest particles. Awesome video!! 👍

[@mudachuka12345]

Really enjoyed the explanations and video. Wanted to ask is there a needle position that needs to be changed or just changing the main jet? Also Iv seen other engine building videos with cars they don’t use oil in piston or cylinder they use WD40 because it lubricates it until the heat burns it off to commence breaking in between rings and cylinder. Lastly I was in Thailand and saw someone rebuild a 125 2 stroke he disconnected the oil feed to the cylinder to break in the rings initially have you heard or seen this done?

[@scooterstreetau]

The main jets 88 in the end, skip the video to 52:00 for a run down. After 2 weeks we followed up with a systems check, we finished the carby with an 85 main JET, Needle is an A22 Middle notch.] For the WD40 question, 4 stroke system is different, the 2 stroke system has oil and fuel in combustion so it might be best to run with oil...

[@jimccc9467]

Hi guy’s, great video. I just picked up an 09 Aprilia SR50 Ditech. Lots of discussion about proper spark plug, what is your opinion? Scooter is unmodified-for now. Thank you.

[@scooterstreetau]

Thanks mate. We use the spark plug ZMR7AP or you can use a CPR8E. You should change them often.

[@mikkei3532]

great video

[@scooterstreetau]

Thanks! Glad you enjoyed🙌

[@2TLifesTV]

Nice video brother! cheers!!

[@scooterstreetau]

Thank you, you have great video too👍

[@2TLifesTV]

@@scooterstreetau Thank you so much brother! cheers!

[@2TLifesTV]

@@scooterstreetau Thank you so much! Godpseed

[@scooterstreetau]

@@2TLifesTV 👌

[@scooterstreetau]

@@2TLifesTV 🎅

[@hoedemakerbart]

Cilinder is way to tight. Use a torque wrench. M7 12-13NM , M6 11NM more then enough. If the cilinder can't expand piston will scratch the wall. And the spark plug needs 1 figure colder then stock. Air cooled ngk is 7, you need 8 then. I have a scooter repair shop to. Nice work 👍. I have never measured squish not even with racing cilinders and i have build a lot of 20-23hp scooter engines. Only of they come with multiple gaskets, you could do that. But extreme high compression also means using super unleaded

[@scooterstreetau]

Great comment, thank you, it is refreshing to hear from other shop owners who have a ton of experience. We have a set system when we fit even a standard 50cc cylinder and based on experiences and many mistakes over the years we have come up with this system. It works for us. We try to do all the checks and tests including the piston wall clearance to obtain the best result.

[@hoedemakerbart]

@@scooterstreetau it's important to use a torque wrench on the cilinder

[@rokasrutkauskas274]

Yesterday I assembled the cylinder. As if I did everything well, I think I put the rings on well. I did cylinder break in today. For the first five minutes, I let it work on idle speed. I let it cool completely. Now it starts very hard, Fires up, works for one second and then goes out. What could be the problem? Could it be the seize? Also it has very high compression

[@scooterstreetau]

Did you do all the system checks before changing the cylinder? Did you change the jet?

[@jaydelaney6842]

Hi guys hows it going great video I’ve got a standard 2011 zip 50cc the same as the bike you have here I have bought and installed a Leo Vince exhaust (same as one in video) and the blue clutch springs that come with it also some 6.5 gram mallossi rollers I have also put a 62 jet in the carb the bike starts and ticks over but won’t go more than 10-15 mph could this be just down to carb tuning or is it something else ?🤷🏼‍♂️

[@scooterstreetau]

Hi Jay, Thank you👍 Always a good idea to have the scoot running well first. If there are any issues, correct them before proceeding. Is the Leo derestricted? Is the engine spluttering or does it slowly loose power? Move the needle to the middle notch, Try the 60 Main jet. Report back👍

[@callum14p]

Hey guys, quite obsessed with your KZbin channel at the minute can’t stop watching the vids, my dad and I just bought a 2009 Piaggio Zip. We have the yasuni R derestricted and malossi variator for now. We need to derestrict the bike, I’ve watched a video of yours where you take that plate out but I need help on choosing a new main jet for the carb? Do you have any recommendations please I saw on one video you guys put a 62 jet in but that currently means nothing to me I’ve looked on our local website and there are 5mm jets 6mm jets etc? I hope this makes sense and any help is appreciated thanks from England 🇬🇧

[@scooterstreetau]

Hi Callum, what a great message, thanks buddy👋👍. With the Yasuni R you should have already: Upgraded the jet size, adjusted the rollers and added clutch spring set. You Should remove your current jet and heck the sizes to get up to speed with the size lingo. The Zip has 6mm jet with a size of 53. You should start with a jet size of 62 and move from there.. it is important to do the other small parts I have mentioned..

[@callum14p]

@@scooterstreetau thanks for the speedy response guys, haven’t fitted any parts just yet I just wanted to make sure I got everything together first before we tackle the job. Thanks for your advice guys I’ll start with the 6mm 62 jet

[@scooterstreetau]

@@callum14p Great plan👍

[@callum14p]

Hi there, back again we finally fitted the parts to the scooter. Malossi variator with 7.5Gram rollers and added yellow clutch springs as well as the yasuni exhaust. Fitted a new carb as well as the other one had been abused and the thread on the main jet had been stripped. Took it for a ride out yesterday and acceleration was weak and top speed to 60 kph. Also main jet size is around a 65 jet according to the box on the new carby. Hope you could shed some light on how I can fix the slow issues. Appreciate your knowledge

[@Leopold.]

Makes the new reeds a big difference when it comes to acceleration and top speed. Are they better than the original reeds with this setup?

[@scooterstreetau]

The Carbon reed petals give a snappier response to the throttle action which enhances the engines rpm over the initial twist. The reed petals are provided in the Malossi sport kit for Piaggio. Some performance reed valves are larger and allow more fuel mix to flow.

[@kirksmith8659]

When going to the 70cc ,do you have to adjust your oil pump to allow more oil? Or will the fuel to oil ratio be the same? Thank you

[@scooterstreetau]

I don't, I ensure it is working well and has no leaks or questionable oil hoses in or out.

[@krazed0451]

Very nice! A bit of discussion around ring end gap wouldn't hurt ;-) Do you find you ever need to adjust pilot jet when installing a pipe and cylinder?

[@scooterstreetau]

Not needed to adjust at this level, the pilot and main give a crisp carburation when throttled.. Needle or needle position.

[@krazed0451]

@@scooterstreetau Perfect, thanks!

[@scooterstreetau]

@@krazed0451 🤙🤙

[@technomama1]

Thank you for wonderfluly detailed video! Is it mean that Vespa lx 50 2t can be made liquid cooled? What parts from what model shall I use? Thanks so much!

[@scooterstreetau]

Look into the ZIP SP water cooled engine. It would be these parts to adapt to your Vespa. A combination of Malossi and Genuine parts.

[@technomama1]

@@scooterstreetau fantastic, thank you!

[@scooterstreetau]

@@technomama1 Big project but will be worth it👍

[@technomama1]

@@scooterstreetau I'm halfway of it, just noticed that while casing casting is exactly the same as the one for liquid cooling, the impeller shaft bearings seating is roughly shaped and not bored. I will fit an electric pump I think if they are reliable? And if the electric system would accept that.

[@scooterstreetau]

@@technomama1 Yes the electric pump is the only option, you can find a variable speed pump that will be best.

[@pubggamers505]

Good work👍 🇮🇶

[@scooterstreetau]

Much appreciation👌

[@adamhelesfai7601]

Hey Guys! Would you be so kind to specify (stiffness/ rpm) the clutch springs you’ve ended up installing? Color codes are sosososo different from brand to brand. Are they the blue ones from the Malossi MHR spring kit? Thank you for your recommendation on the exhaust, I’ve got the Yasuni R 💪🏻☺️ So right now we have the 70 MHR replica, 22 phvb, and the yasuni. Which color would you recommend to opt for from the delta clutch kits (white, green, yellow/red blue black)? Can’t decide between the yellow or red ones. They both target 6-8000 rpm in the manual, but the red ones are stiffer. 🤷🏻‍♂️ Thanks for the help and the amazing support for the community

[@scooterstreetau]

In this video we installed the blue leo vince springs on this particular bike. The TT and Malossi Sport cylinder make a fair bit of torque down quite low in the rev range so the springs didn't need to be drastically increased. On your bike with the parts you've mentioned, I would aim for around the 6k rpm engagement. The MHR Rep is a great street cylinder because it offers a fair bit more performance than the Sport kit - but in a much lower rev range than a race kit. Its making really good torque around the 6k rpm, much more than that will more than likely lead to clutch glazing and then slipping. You'd really only go for more than 7k rpm engagement on a bridge port race kit which needs big rpm to make power. We often preference the Polini G3, the adjustability is quite user friendly, but the Delta is also a great clutch.

[@JDMz]

Use yellow or white springs. And a white contra spring. Avoid red springs they're only decent for a race clutch with the 94cc malossi kit.

[@scooterstreetau]

@@JDMz We've found the yellow Malossi springs to be ideal with most basic 70cc cylinder kits and exhausts, the white can often be a little too close to factory. Factory or white contra is great with a basic 70cc build for sure.

[@Tatemenclips]

hi guys loved the video where are you guys located in the uk so I can take my scooter to you guys?

[@scooterstreetau]

Hey Cris, thank you very much mate. Did the accent give it away?... We are in Australia..👍🦘🌅✈️🛵

[@Tatemenclips]

@@scooterstreetau oh my god I’m sorry about that cause the north of England sounds like that sorry!

[@scooterstreetau]

@@Tatemenclips All good😁

[@Googlemarsplanet]

Great video guys , question please, my son has a gilera storm, had all the 70cc mods , plus gear up kit etc , also unrestricted coal, cdi, and lots more , the question is the main jet in his 17.5 carb same carb as you have shown in your video is only a 56 , and you have used a 88 , all the work on our bike was done at a scooter shop , have they forget to change the main jet ? Or do you think a 56 jet is ok on a 70cc. Hope you can help us , many thanks !

[@scooterstreetau]

In our experiences, if we did not make the change to the main jet the engine would sustain damage due to overheating, lean on the fuel mixture. It is always hard to comment on others work so ultimately best to check with the installer of the parts, they may have upgraded the jet or had a suitable reason not too.

[@flawlessmusic8850]

Great video guys! How do you set the oil pump for the bigger kit from 50cc to 70 cc? Do we need to set the oil pump to give more oil or leave it the same?

[@scooterstreetau]

Thank you😁 We check the oil pump and ensure the integrity of the system. Must be pumping and all working, hoses, clamps check it all. We make sure the pump cable is tight and responsive to the throttle cable.

[@flawlessmusic8850]

@@scooterstreetau Ok will do so ! Thank you !

[@scooterstreetau]

@@flawlessmusic8850 I almost forgot, check or change the oil pump BELT, this is most often overlooked. Should be changed every 10k.

[@flawlessmusic8850]

@@scooterstreetau I changed it with a new one ! The only think is missing is to find the main black round oring gasket cause it loses a drop of oil once per while and it makes a little mess on the inside . At the moment I took the pump out to clean it and change the oil oring gasket … so I am running pre mix.

[@scooterstreetau]

@@flawlessmusic8850 If you are not using the oil pump disengage it. Premix is safe as long as the fuel/oil mix is consistent. Good luck👍👍

[@filipk681]

Is it necessary to buy a new engine head or can you just use the original one? Also great video!

[@scooterstreetau]

Hi Filip, When buying a new cylinder kit you will find majority of the kits come with a new compatible head. In another instance, Malossi have a kit that only has the cylinder without the head in which case you can use the original factory head. Just consider the gaskets and make sure you have what is required. Thanks for props✌️

[@charlieboy259]

Takes me back 20 years watching this! Do you guys have any original italjet dragsters in Australia? I'm still tempted to do my stock minerelli engine out of mine in full malossi parts now!

[@scooterstreetau]

Hi There, Yes we do have the Italjet Dragster in Aus, we have 4 customers with this machine. With the upgrade, Go for it bang it up and burn🏍🏍🏍

[@charlieboy259]

@@scooterstreetau great stuff! One of my all time favourite scooters! It's been off the road since 2007 as parenthood and mortgages have stopped play for that long but I think I will have to do it soon! I have only just finished restoration on a italjet formula too!

[@scooterstreetau]

@@charlieboy259 Great, yes very rare over here, 3 of the 4 we service are modified and really have plenty of power and such a unique style.

[@charlieboy259]

@@scooterstreetau cool stuff! keep up the great work guys!

[@scooterstreetau]

@@charlieboy259 Thanks CB.✌🦘🦘🦘

[@rshproductions2178]

Hi there, Just wanted to ask a quick question: Does the 70cc Malossi Sport piston rings have any particular position where you placed them on the piston as I cannot see no markings at all on both of the rings. Thank you.

[@scooterstreetau]

Both rings are the same, so the position can be top or bottom. Read the instructions if unsure.

[@hermmie17]

Thank you very much for the time and effort that went into this video. Very well explained and through this i also found another video for what was causing issues for me, worn Minarelli torque driver. If you don't mind me asking, how exactly do you go about tuning for the best clutch spring / roller weights ? I have spent alot of time trying to figure it out but it just doesn't come together. I know that lighter rollers mean that the transmission holds a higher rpm while you accelerate, heavier rollers the opposite. You also mentioned marking the variator to check if the belt rises all the way up. Would you also use roller weights to adjust this or do the rollers just adjust how quickly it rises and don't affect its final height? Thanks for your help in advance and all the best

[@scooterstreetau]

We have several other videos that give an explanation of the variator tuning, check them out. VARIATOR: With everything set at factory as a good starting point, go back to your original rollers, if they are 7.5 grams we have a total of 6 rollers weighing 45 grams total. So we want to lighten the rollers by 1 gram each, let's try the 6.5 grams (total of 39 grams). Marking the variator face prior to closing the clutch cover (which we can check the belt travel after the testing). Now test ride and note the difference. Just repeat this step and reduce the amount of weight change, by this I mean try a .5 gram change or even a .25 gram change for each roller. Your looking for a higher RPM earlier and a continued PULL as the variator changes through the gears. CLUTCH: The clutch can be set using a higher tension clutch spring set. Many of the Manufacturers have a chart to guide you on the tension of the clutch springs with an RPM engagement chart. So just go for around 5000RPM. This will delay the initial movement as the clutch engages. Remember to revisit the roller weight so the RPM stays optimal and does not dive through the gear change. Patience is the key and also document the weight change and the resulted changes you experienced and the test rides. Hope this helps and thanks for supporting our Channel.👍

[@hermmie17]

@@scooterstreetau thank you very much for the detailed answer. Will look into this.

[@hermmie17]

@@scooterstreetau Just finished fiddling with it, thanks guys it runs very good now. Putting a rpm gauge on it for testing has helped massively too. Peak power seems to be around 7500 rpm, with 5.0g rollers and stiffer contra / clutch springs ( polini 3g clutch with green springs on almost full preload and polini evo contra 10% ) it takes off much better and runs at about 7300/7400 rpm in normal city speeds. One question though, i think that the torque driver starts shifting slightly before the clutch grabs. Should i try fitting an even stiffer contra spring to make it shift later? Thanks again, very much appreciated and all the best from Germany

[@scooterstreetau]

@@hermmie17 the Driver will only shift if the belt pulls with pressure. Are the springs set too heavy? Are the rollers too light? Play with these parts one at a time to note the road difference..

[@smbanditt]

Ever heard about the PM Tuning 70cc kit and if it works great on piaggio zip?😁

[@scooterstreetau]

Yes we have, we had 2 Italian Techs and they said the PM Tuning were fantastic Kits🤙

[@threefootflatty3688]

with the exhaust installation, i saw one of your videos that they have a restrictor in them. did you guys remove it before installing?

[@scooterstreetau]

Yes we do, otherwise you will not optimise the potential power of the exhaust.

[@Vitaliyhh-dd4ef]

I HAVE THE SAME SET UP EXACTLY, CAN YOU PLEASE SUGGEST HOW MANY TURNS OUT SHOULD THE AIR MIXTURE BE? THERE ARE NO VIDEOS ON KZbin ON HOW TO ADJUST A PHBG 19 CARB! IM NOT SURE IF YOU HAVE THE SAME CARBURATOR AS ME

[@scooterstreetau]

3/4 to 1 turn out.

[@basicallyedward]

I watched this video as a guide to install my Polini 70cc, with a Technigas silent pro exhaust and 17.5mm dellorto carburetor with a free flow air filter... I was just asking that how my jet size has gone from 84 to now 115, and it runs everything better but like, I had the 84 for quite some time and it thought it had enough several times, because it was running too lean. Fixed the lean issue and hoping that I don't have to open the engine this time.

[@scooterstreetau]

Thanks B.E. yes true! the free flow air filter (POD) will require large amounts to fuel to balance the fuel air mix. You may also require lighter rollers to build RPM. 84 is very lean for that type of air filter, so I am glad to hear you tuned out the issues👍

[@basicallyedward]

@@scooterstreetau it just took two pistons to me to realize that was the problem. And I highly considering by buying a new 70cc Polini Sport kit, just so I can drive in peace without myself worrying about it. It has survived now closer to 1000km with that piston, record for that moped on one pistol so far, but what worries me is the vertical lines inside on the cylinder. I have a camera that I could stock through the spark plug hole and see the problems...

[@scooterstreetau]

@@basicallyedward Your not alone, for a daily I prefer to use a modified air box.

[@basicallyedward]

@@scooterstreetau yeah but what you guys say about vertical lines on my cylinder?

[@scooterstreetau]

@@basicallyedward There should not be lines on the cylinder. When you run lean with an under fuelled system damaged is caused due to excess heat.

[@ashleyperkins4360]

Really interesting video! I have a Piaggio Fly 50 4T 4V - gets up to about 60 kph. I want it to go faster - am I better buying a 125cc? I’m not mechanically minded at all. Any advice appreciated. Thank you 🙏

[@scooterstreetau]

Hi Ashley, Thank you. Yes you should buy the 125cc or higher. It is expensive to upgrade the 4 stroke engine and the end result is not as good as the 125cc.

[@meetvurst1213]

Great video but if the person is not expert who is changing all this, they should not change all at 1 time, if it wont work, he/she wont know whats wrong

[@scooterstreetau]

Totally agree with you. This is the best way to learn what each change does and trouble shoot.

[@mrmajestic1478]

Hallo guys, Happy Easter!!! Thank you for the video, it was very informative. But I am betaling my carb demons, I can't figure it out to be honest... I have a piaggio nrg power dt 2015.with recently installed 70cc malossi sport.(stil in posses of riding it in, already made 30k + with 30/40km,h gassing up and down, BORING!) The carb is dellorto PHVA 17.5 with electric choker. I have a problem dialing it in... If I keep rpms up to 7 k it runs 35/40km/h max but if I open my throttle more it begin to drown, loose power. I have put a jet 84 in the screw that is closest to the engine is turned 2 full turns and the one closer to air filter(the long one with the visible spring) 3 full turns. It starts with no problems, it is running fine in "newtral" and up till 7k rpm than the problems start... Could you guide me in the right direction? I leave close to the shore so elevation is not that relevant, but temperature shifts from worm to chil qute often! Thank you in advance and one again Happy Easter! 😊

[@scooterstreetau]

With the carby screws: The one close to the air box should be 1 turn out and then leave it. The other, controls the idle so adjustment is made so the rear wheel is not spinning free when parked on the main stand. Check the auto choke and be sure it is working correctly. Now change the jet until the rev become clean, always start with the needle in the middle notch when changing the jet.

[@mrmajestic1478]

@@scooterstreetau thank you very much for your reply! I'll try to do my best and keep you updated :)

[@scooterstreetau]

@@mrmajestic1478 The auto choke is responsible for many troubles in the Piaggio system, do the sun and the fridge test. And measure the difference, minimum is 2mm.

[@ants4193]

i have a question, when i am riding and suddenly break very hard and stop, my moped dies if i dont rev it while breaking. otherwise drives very good and mixture and everything is correct

[@scooterstreetau]

You may have an issue with the carby or fuel related. This could be the choke, an air leak in the rubber that is jolted when braking or carb setting need adjusting. Even worth checking the wires to the stator and the connectivity.

[@danielgodin852]

Hi guys, mechanic here from qld Just installed your -70 cc kit -Tt exhaust with cone restrictor removed - single hi flow filter -85 main jet Yellow clutch spring/5.7 rollas Scooter sputters low revs and revs out perfectly. Could removing the cone restrictor cause this ? Not enough back pressure ?

[@scooterstreetau]

Most likely the jetting, tune on a warm engine. What is the single hiflo filter?

[@danielgodin852]

@@scooterstreetau The single red malossi air filter Do you need to add a higher jet if you remove cone restrictor? I followed your video step by step with all the same mods only thing different if the cone restrictor removal.

[@scooterstreetau]

@@danielgodin852 Yes, Always retune after any modification.

[@functional_gaming7188]

I have a Aerox 2016m and i have a hard time understanding what weights you should put. Like if i have a Extra exghaust and a Variator kit MALOSSI MHR 2000 Multivar MINARELLI what kind of weights shoul i use. And a last question I have a 12mm carb if i do these upgrades should i put in a larger carb ?

[@scooterstreetau]

The larger carb will be an advantage with the sport exhaust. With the roller weights use the ones Malossi recommend and if you want to use different weights trial with a 10% change per roller. Trail and testing is best.

[@functional_gaming7188]

@@scooterstreetau thank you very much :)

[@trooperwolfie]

Ive only just come across your video...i know im late to the party, but id be happy with 38 mph on a 50 here in the uk, we're restricted to 28 mph (it used to be 30 mph before the EU decided to be tw@ts)😂

[@scooterstreetau]

Welcome and thanks for watching. Yes it makes the Zip much more enjoyable. We hope you enjoy our Videos.