70cc top end rebuild (2-stroke)

[@Skipp3rBuds]

This helped so much! Just bought a tgb key west of Craigslist and was told compression was fine, turned out it wasn't :( however he sold me a 70cc bore kit with it! Your video helped a ton!

[@anglegrinder4630]

hell yea man,straight to the point,them 4 strokes are a whole other monster huh?

[@elwoodwatson9906]

Thanks Matt, that's the engine my basket case Malagutti Yesterday has. Just moved to larger storage unit today, still got 10lbs stuff in 5lb box, made the decision, if my junk don't sell, it's headed for the dump, this is a scooter unit, still need to store and rebuild 3 other scooters. Love your explanations, makes the job much easier.

[@5280livin]

Would it be necessary to upgrade the variator and clutch with the 70cc kit or can you get away with just a top end rebuild and a new pipe to support it?

[@emirhan2447]

Really satisfying to watch, great knowledge. Thanks!

[@jasonretamar2849]

What park plug you used ? Have a part number?

[@curtfox91]

Thanks i followed step by step worked out great

[@gorgiev2243]

Do a a scooter with a piaggio engine tune it to its limits!

[@boydjensen3161]

I have a 2002 Zuma. Do you recommend plugging of the oil pump (injection), get a 21mm carb and go pre-mix? Any recommends on the jetting for the 21mm, with 70cc Pollini?

[@Nickpeezy94]

I still run a oil pump on my typhoon with a 70cc polini sport kit but i do measure out a additional ounce for peace of mind for gas tank and for the 21mm carb i run 115 main messed with air fuel screw didn’t touch pilot jet my cylinder is ported fyi

[@boydjensen3161]

@@Nickpeezy94 Thanks for responding.

[@anglegrinder4630]

that wrist pin looks huge compared to the one in my kit,g clips too

[@tdot1269]

I heard these were easier than 4 strokes but I didn't think I could do with my eyes closed... Holy fuck that's simple

[@stephenlnoe]

I would appreciate a video showing how to take the engine off the bike like you have done on the Genuine Buddy 50. What all has to be done to drop the engine/back wheel from the bike so it can be worked on up on a bench?

[@badtchad4935]

How much clearance do you need for the piston head? So it doesn’t hit the plug.

[@courtlandFDouglas]

How did you take that entire thing off to begin with??

[@robertosantana6678]

What is the reference of the new spark plug that you put in?

[@thehatedgamer7634]

Can you please tell me the model of that spark plug? Thank you.

[@tdot1269]

BPR7HS is the stock one. HIX is the iridium one. He most likely using 9 instead of 7

[@robertosantana6678]

I have a Genuine Roughhouse and I bought a 70cc kit and I would like to know what spark plug should I put on it?

[@vasanthakumar7896]

Have you done compression test. If done can you tell me how much pressure required to get best ignition?

[@TheSpagEddie]

Do you need to do anything with the carb going up in cylinder size 50 to 70cc?

[@SubieSage]

ok hold on....I got the naraku minarelli 70cc kit and 70cc head and it came with the rubber head gasket AND a metal head gasket. I thought I was supposed to use both. Should it just be the rubber gasket?

[@BasseC05]

I'm glad that its a pgo big max motor

[@toddbachman3912]

HOW... MUCH IS IT TO TAKE THE ENGINE OUT OF THE FRAME LIKE YOU DID... I. HAVE A BUDDY AN A ROUGH HOUSE . IM THINKING ABOUT DOING BOTH .. THANKS 👍👍

[@badtchad4935]

Anyone know what spark plug he used for the new Polini kit? The longer one?

[@fintonmainz7845]

Excellent

[@bigpapa8152]

The simplicity compared to a 4 stroke. Wrenching would be a breeze.

[@teoankov7623]

Thanks man

[@Hoosirdaddy]

i have a vx50 with a 70cc bore and the pison ring broke off and got weged in the jug and the pison thats what i call epic motor fail top end that is

[@telomerestelomeres7775]

If the bore is changed to bigger displacement and if the fuel injector is not programmed accordingly then will it work?

[@christopherdarrough2667]

What's the best way to set the squish band on Athena kit I've been messing around trying to get this squish right for a week with solder and calipers but keep getting uneven numbers I couldn't even get close with the factory head so I put a o-ring polini sport head on it i hear it needs to be at .9mm the Polini head fit good hope it works ok

[@dekio9245]

Can i put one of these big bore kits in a pgo xl xrider ATV? 50cc 2 stroke

[@tobiasnielsen1597]

The black pistonring are supposed to be on the bottom on most cylinder kits

[@telomerestelomeres7775]

For scooter with fuel injector, change of cylinder kit is possible?

[@wakizashi3689]

Technigas Silent pro rust like hell if it doesnt get a coat. it can even rust so much that you can get it of the cylinder without breaking the cylinder

[@Barbarossa010]

You have to built a Piaggio 86,4cc 2 stroke engine swap 🤪Malossi MHR power💪

[@richardgabrillo1926]

Is that fit on my kymco super 8 50 cc 2012 model

[@ThatDudeHandy]

whats the new long spark plug part number? thanks dude love the vids!

[@jackmehof2807]

Where can I find a replacement base gasket (that green one) for a roughhouse 50

[@chriss4365]

I replaced the gaskets on my 150cc and the inner gasket was leaking again at the bottom i took it apart and the gasket is properly seated what the heck happened and will it happen again? That inner case gasket was leaking on the top before when running the engine now the replacement gasket was leaking on the bottom.

[@evertonjroque]

Excellent ! come to Brazil!

[@predator_boiz336]

So buddy 50s and kymcos have horizontal minerillis like a bugeye or the vertical like a prebug?

[@RollingWrench]

Horizontal. They are not the exact same engine as in a zuma. But very very similar

[@predator_boiz336]

@@RollingWrench so Can you build the cheaper 2ts? My guess would be no cause nobody does, everyone builds Yamahas and Hondas

[@chasebrunner]

Great Video Does This Work For C3 As Well

[@jonlongozo4202]

Hi, I noticed on your rebuild video that you were working on a buddy. I recently put a 70 cc upgrade from the standard 50 cc. I left the stock carburetor and exhaust on it when I upgraded. When the motor is cold, it has very good compression and picks up speed nicely but once it is warmed up, I lose a lot of compression especially going up any type of incline. I noticed when I opened it up again that the piston was not hitting the top of the cylinder wall. Do you have any advice for me in this sense?

[@kellyhill430]

The script on one side of the ring goes up it's usually the letter N stamped on one side of the ring ...well that faces up

[@jaydoesanything7652]

Whats the name of the longer spark plug you put in the cylinder head?

[@MrNotorius5500]

Isn't the cylinder also called the jug in these air cooled 2 cycle engines?

[@RollingWrench]

Yes

[@HeinriksPatriks]

Hello.Oil mix with gas changes when upgrade from 50cc to 70cc? Or it iis the same for both 50cc and 70cc? Thank You.

[@RedzicAnel]

I replaced everything as you showed, but my scooter wont start for nothing. It starts for short time with start spray, but then dies and wont start

[@winnerwinds6509]

Not the engine then, may be carb or spark or something.

[@anglegrinder4630]

the only problem i have at my house is space,same exact engine,this can be done without taking engine off the scooter correct?

[@raymondbetancourt6498]

Yes if U know what your doing. Also built a small shed,for scooter.look it up on Utube.lol

[@bigpapa8152]

What's the torque spec for the head bolts?

[@cameronandrist5101]

Sheldon Bourgeois 6.5 foot pounds

[@RedzicAnel]

I have 50 psi after big bore on my Keeway 49 Fact. What could be a problem?

[@RollingWrench]

Tight valves, bent valves, or piston ring issues

[@RedzicAnel]

@@RollingWrench its 2t no valves, rings brand new as well as piston

[@roywalls5595]

Thinking replace hold motor out to custom built gt6 go kart motor?

[@davidpruitt7878]

I was wondering if you could give me some ideas what would cause the end of the crankshaft to snap off. This happened to me with a gy6 50cc engine

[@RollingWrench]

The crank nit was over tightened

[@davidpruitt7878]

Thanks for the answer

[@davidpruitt7878]

Rolling Wrench Scooter, Motorcycle, & ATV thanks the reply

[@christiangrenier1162]

Oui merci

[@damienwhite9187]

so I got a 2008 kymco super 8 50cc 2t... I bought a Naraku 70cc bore kit. it only came with the cylinder part with the exhaust port and the guy had to swap out the 10mm piston pin and piston with a 12mm piston pin and piston. it also came with gaskets and piston rings... I swapped it over and got the rings on and cylinder sleeve on and lubed it up and torqued down. I didn't get to upjet it yet cause improper thread size for the jet I bought to go with it.. and the exhaust won't fit due to the exhaust port is slighted so I have no exhaust on it. I crunk it up and let it warm up and then turned it off. I also got a aftermarket air intake too. it will crank and run but when I accelerate it hardly will move at all. can you tell me the areas I can work thru to get the issue fixed? please and thank you

[@anglegrinder4630]

G-CLIPS N PISTON RINGS,HOLY SHIT DUDE,DO THIS BUILD(MINE WITHOUT DETACHING) AND SEE WHY SOME MECHANIC CHARGES YOU 200$.ITS REALLY LIKE A 75$ JOB BUT WHAT A PAIN IN THE ASS,AND ITS THE SMALLEST PART (ETON BEAMER 50)

[@anglegrinder4630]

did you use the same piston?just for show?

[@RollingWrench]

Same piston new rings

[@Hoosirdaddy]

g clips are a pain in the arss to get in lol

[@kjellringstrom6217]

Try a C clip.

[@jameswiseman5963]

Is this the same engine as a 2006 SYM Jet euro x50? Please let me know.

[@samuelkinsey5430]

Hey rolling wrench I'm looking to buy one good used one let me know if you got one

[@denisrousseau9071]

Do you upgrade the carb ? I mean re-jet and what is the main jet size for this particular PGO SETUP ?

[@brittnadeaunadeau3168]

Stock genuine buddy is #75 main jet I recommend #80 or #85 for big bore kits in stock carbs with prima exhaust

[@trapp7763]

I have a tao tao 50cc scooter. it has a 10 inch wheel on the front. any way to put a 12 or 13 inch wheel on the front?

[@Kyle_gallegher]

Does the shroud even cool how is it not cooler with it off and the fins receiving air honda doesn't do this 🤔

[@michaelhadock7495]

Exactly what kit did you install and where was it purchased?

[@theatlasvision]

Its a polini kit, if your in usa try scooter swap shop or canada scootertuning

[@T-knuckl3s]

where can I find a good name brand big bite kit, would you recommend one? Thank you

[@deurlii7920]

Dr70 is great quality, but It's not extremely powerfull.

[@SHx589]

Malossi is what all the cool kids have. 😎

[@larrbaII]

@@SHx589 That's the rich kid's. Right? ;)

[@jeppenielsen3626]

ty. good video :)

[@Sneds_]

What do you recommend for premix?

[@SHx589]

Whatever the manufacturer suggests. Check your manual.

[@sotiredinmi3077]

Is a 70cc big bore kit the biggest big bore kit you can get for a 2 stroke?

[@michaelmcdowell8243]

why was there no flywheel or headgasket?

[@mwilliamshs]

The flywheel has the white plastic fan attached, left side of the screen. 8:30 *points to bottom of head* "i put a new gasket here"

[@junjun9517]

Why not try if will run the engine or not? Start it up.

[@winnerwinds6509]

No carb lol

[@seibles1]

How much did it cost

[@wiebe9999]

Sure that not the crome ring is top ring ? Never seen a black ring as a top ring

[@xanhede5657]

Yes, you are right. The chrome ring should always be on top of the piston. He didn't clean the top piece for the cylinder either, for some reason.

[@grimreaper7862]

So whats better a 2stroke or a 4stroke i got a buddy he gave me a 2stroke and another buddy has a taotao 4stroke but id have to give 80 bucks for it and bad thing is no titles

[@jodier911]

2

[@soli5257]

how many cc is thi scooter

[@nikolasdybblmonberg1632]

that exhaust is too small its not going to perform very well you need a gianelli go exhaust or bigger

[@RollingWrench]

True. Unfortunately my customer didn’t want to pay for a exhaust. But I agree

[@that-midas6781]

Nikolas Dybbøl Monberg that exhaust perform just like a giannelli go

[@jamesrisen5370]

@@RollingWrench what's a good web site for big bore kits I have a adly silver fox 50 2strock and am look for a kit can you help

[@daletaylor4065]

@@RollingWrench I have the same exhaust on a roughhouse ,what main jet do you recommend for the stock 50 engine,and for the 70cc . I have the stock airbox now, and I have a black uni filter in case I need it.

[@tjjohnston7920]

Thats what he said😂

[@raymondbetancourt6498]

Where can I order parts besides eBay for an 09 Kymco sting/yup 50cc 2t? Thanks in advance...

[@jami2580]

abit late but really depends where you live, maxiscoot is good imo

[@AiRsOfTfReAk5293]

What’s the spark plug

[@strangewoofer5780]

Do two strokes not have camshafts???

[@RollingWrench]

No, 2-strokes don’t have cam chains, cams, or valves :-)

[@strangewoofer5780]

Rolling Wrench ATV Scooter & Motorcycle Huh....learn something new everyday I guess

[@cameronandrist5101]

Strange Woofer 2-smokes are 10 times easier to maintain and fix in the case it ever does brake

[@AAI30]

Hey what’s the old spark plug you used? And the new one? I have a similar engine which is on my Chinese quad. Just want to know if I should do the same spark plug change you did. Thanks in advance.

[@davidemerulla7355]

I though that the chrome ring goes nearby the top of the piston

[@TheMads85]

It does, He put the piston rings on in the wrong order, Black is always in the bottom

[@miodragvaraklic730]

Imam kumko agiliti citi 50 2t r16 koji cilindar od 47

[@j.patino8148]

I advise you: remove the cap that obstructs the entry of air. it is likely that you can melt the cylinder

[@RollingWrench]

Ahhh, it breaths from the sides. It may have looked capped off, but it’s not. That’s the oem design

[@j.patino8148]

@@RollingWrench must absorb on the right side. and this right side should not be covered. remember . It is an AC cylinder

[@RollingWrench]

j. Patiño it comes that way from the factory. It would be better to open it up more I’m sure.

[@johncoscia5258]

Port timings mechanic ?

[@juandelacruz-fl5rp]

excessive vibration on engine....not balance cranshaft

[@RollingWrench]

That could happen

[@tjjohnston7920]

Sorry Im a grown ass child😂

[@2-strokedream]

its not a jog motor it a PGO HOT 50 motor

[@RollingWrench]

True, same design though

[@that-midas6781]

@@RollingWrench actually theres a big difference between those 2 engines. Cylinder, exhaust, clutch is the only parts that fits from the jog engine. Even the engine dosent look like a minarelli engine

[@RollingWrench]

That - Midas very very similar. Enough so that the procedure looks the same. Part are different yes. Thanks for chiming in :-)

[@anglegrinder4630]

wheres the fan?

[@Rkgsene]

That's nog a real minarelli verticale engine thats a realy cheap nockoff

[@RollingWrench]

True

[@nehpetssaid]

@@RollingWrench Are you people smoking crack? The Genuine brand is killer. The engines are solid as fuck. Genuine offers a 2 year parts and labor warranty and 2 years free road side assistance with a new purchase. All of that for a little over 2g's, come the fuck on. Also that's a fucking horizontal...

[@PusterPL]

Minarelli knock-off motor, used in PGO scooters where i live, this motors downfall i the inlett side, IT SUCKS BAD!

[@8700jonas]

Pgo is actaly a copy of minarelli

[@that-midas6781]

dansk e-cig rewiew Jonas hvem har fortalt dig det?? Pgo har lavet deres egen motorblok som ikke er en kopi af mina's blok. Men derimod hvis du køber en cpi popcorn eller lign så er der en kopi af minarelli

[@8700jonas]

@@that-midas6781 det er en kopi af Mina begge to