DETAILED! How to rebuild Yamaha Aerox top end(cylinder, cylinder head and piston)

Thanks for watching! Leave a comment for feedback please so I know how well I’ve done. Cheers. EDIT: in the video I quoted to keep the circlips safe because they can be reused. This was a mistake. NEVER re-use c clips as the can lose spring and most likely come out and ruin the piston and cylinder, possibly even the head👍🏼

[@giano1782]

best video if you dont know how to change your cylinder !

[@jakhy1198]

giano178 thanks a lot mate. Yeah that’s why I make them because no one on here does detailed ones

[@giano1782]

@@jakhy1198 no problem and you got yourself a new subscriber

[@jakhy1198]

Appreciate that mate cheers

[@Pol5k1]

Thanks a lot! Very informative. I think that I messed up my aerox's engine last summer, so I'll have to open it up and see what happened. I checked it out after the kick starter got stuck to find out that it ran out of water, I found the expansion tank empty.

[@kjellsjoberg4449]

Thanks for a great video, it helped me all the way to change cylinder. I hope my son is proud of me :)

[@Gus247365]

Really useful - thank you for the full in-depth step by step! 👌

[@dasheddevelopments6125]

Awesome vid. I took mine apart today and had the issue with 2 stroke bottle. Simple solution for the rebuild obtained ✊🤣

[@Aj-om4dt]

Best video I’ve seen made so far dude really good information I’ve got a Malaguti Firefox F15 2006 & a 2001 the 2001 I’m bringing back to 100% standard condition but de-restricted & a malossi variator kit with 4.5g rollers & selling. I’ve got a Yamaha 1995 BWs with a full stage6 setup including the crank it’s extremely quick I use to have a aerox 2005 new I had it de-restricted (the washer from the variator removed, it went 53mph just with the restrictor removed

[@welshplug9910]

Top man followed this for my 2014 jog rr liquid cooled

[@brennn4587]

thank you today im gonna try this out and its the first time im going to change a cilinder since i blowed mine and it needs a new one

[@jakhy1198]

Sounds good. It really isn’t bad, just take your time and think things through.

[@brennn4587]

@@jakhy1198 will do how long does it take normally?

[@brennn4587]

@@jakhy1198 and make more aerox vids i love them they are detailed and really clear

[@jakhy1198]

For me it would take a couple hours, but the first time I done it as a teenager, probably double that.

[@brennn4587]

@@jakhy1198 and u explained it in 30 minutes😭 well done bro honestly u earned another subscriber

[@clips15]

Such a good video

[@roel7930]

Thx for the video, this is the only detailed video i could find. My 50cc broke down and now its time for 70. Do you still own ur rox?

[@jakhy1198]

I do indeed. Had it a fair few years now

[@john_knee_pee]

​@jakhy1198 mate I just got a 2010 Rox, bought it a bit blind as a running project but it was leaking coolant everywhere from flywheel casing, even coolant around the stator and ignition coil. I feel like there are bits missing, i.e there are two rubber bunged holes on the plate of the casing facing the engine.. should they have tubes in mate? I cant really find anything else on here 😂

[@Loui_Bart]

i saw this video saved it and blew up my top end the day after

[@jakhy1198]

Ahh that sucks to hear, but I’m glad you’ve got a guide to go from to repair it.

[@WIRERESET]

The nuts of the cilinder head only need 13 nm

[@jakhy1198]

Cheers, I’m aware they’re not much, but I just snug them to where I feel comfortable, always have done.

[@richardd9867]

Great tutorial. I just bought a aerox 50cc which has apparantly had the 70cc kit fitted. The bike takes some starting and have noticed is has a medimn reach plug but when i look at the plugs for the 70cc upgrade it says use long reach? Can you give me the pkug number you had in your 70cc upgrade please

[@jakhy1198]

Hello mate yes. Br9es or br8es should be the right ones.

[@Aidod27]

Nice video, I've a Firefox which has the same engine/head (lc), temp gauge keeps flashing on the digital display, do you know where exactly the sensor is on the cylinder? Cheers

[@salimm6758]

The sensor is in the top of the gasket near the sparkplug

[@JYKDutchYT]

I'm going to do this this week so thanks for your tutorial mate it literally is just a 15 minute job. But I have one question. Will the standard carb settings still work with the new cylinder or do they have to be recalibrated?

[@jakhy1198]

Jamie Yang it depends on what cylinder it will be mate and also depends on the exhaust

[@JYKDutchYT]

Jakhy I have recalibrated it because it didn't run well and it's running well now. I choose a cast iron cylinder now instead of a aluminium.

[@giorgakhsss6153]

You are a geek mate thanks so much

[@jakhy1198]

Lol

[@ChadTheLad]

Thats a rough looking aerox!

[@jakhy1198]

JDM Gaming indeed, that’s why it doesn’t look like this anymore

[@l.04t69]

Make a video on how to fit big bore and what you us for ur 70cc

[@jakhy1198]

Fitting a Big bore kit would be precisely the same steps.

[@absolutebullcrap7273]

Yo mate could you make a tutorial on how to swap the stock carb?

[@jakhy1198]

absolute bullcrap really good idea mate. I think I will do that👍🏼engines out at the minute so when it’s all going again I’ll be sure too!

[@absolutebullcrap7273]

@@jakhy1198 thx mate rlly helps me out i have just started my new project but the aerox carb is kind of a pain with all the extra cooling and sheit yaknow

[@jakhy1198]

absolute bullcrap no problem mate. If you’d like help doing it before I make the video let me know. If you have Facebook send me your Facebook link or name and I’ll message you

[@jordancapel4198]

Great video mate very detailed and enjoyable

[@jakhy1198]

Jordan Capel cheers mate. And yeah that’s why I made it because no ones makes detailed Aerox vids on here

[@jordancapel4198]

@@jakhy1198 are there going to be any more how to vids in the future I enjoy your content just like mark savage

[@ogjogi4506]

Jakhy pleas how to install power tube

[@jakhy1198]

Pewkele do you mean a boost bottle?

[@ogjogi4506]

Jakhy yes lol

[@antltarling3858]

I got a yamaha aerox yq 50 and use so much coolant as I ride it . would this be water pump or head gasket do you think can help me please

[@jakhy1198]

ant ltarling hi mate, drop me a dm on insta J7KHY

[@antltarling3858]

@@jakhy1198 I can't find you on it fella

[@jakhy1198]

Wanna send me your face book name mate?

[@antltarling3858]

@@jakhy1198 facebook.com/profile.php?id=100009117022853

[@antltarling3858]

That my Facebook fella if you can help me out

[@xx_g3t_rekt__xx603]

Did you run the 70cc on stock carb? Did it work good? (With other jets of course)

[@kehariracing9884]

it will have no torgue with a 12mm carb

[@hardendurobosnia17]

@@kehariracing9884 do i need new carb for a sports exhaust?

[@kehariracing9884]

@@hardendurobosnia17 not needed but it will have more power with a 17.5mm carb

[@hardendurobosnia17]

@@kehariracing9884 I'm just trying to see if it will last, thanks

[@jakhy1198]

The engine would benefit hugely for a larger carb, but at the time I ran the 12mm and once jetted right the bike was a lovely commute and had plenty of top speed. It just didn’t have the potential power it could have had with a larger carb.

[@antuning5656]

Hello my friend do you now whats the real function of the 2 tubes goes from the top of the cilinder to carburator with water? If i eliminate them is any problem?

[@jakhy1198]

The 2 pipes that go from the head the to carb are simply to keep the carb warm it the winter to stop the throttle slider getting tight and jamming. You shouldn’t have an issue blocking these off

[@steinar6932]

What a Great video!

[@jakhy1198]

Thank you 👍🏼

[@steinar6932]

@@jakhy1198 It really helped me man. As a 15 year old who cant shit about scooters and engines and just got a aerox i think I actually change cylinder because of your great explaination and video :)

[@septixs8355]

Very helpful mate

[@winstonbanks1057]

Are they heated grips

[@jakhy1198]

Winston Banks yeah mate they’re Oxford heated grips

[@steinar6932]

Hey, just got my malossi sport 70cc but Im having trouble getting the piston in the cylinder. Its like it wont fit. Ive tried for so long and I have gotten help from 3 others to push the pistonrings in but it wont fit. Do you have any tips?

[@jakhy1198]

With the piston in hand, can you compress the piston ring all the way into the recess on the piston so it’s flush with the piston?

[@steinar6932]

@@jakhy1198 Yes, but when press it while i try to put in in the cylinder it wont fit.

[@jakhy1198]

With out the piston ring installed on the piston, will the piston fit into the bore?

[@steinar6932]

@@jakhy1198 Yes

[@steinar6932]

@@jakhy1198 Fuck me. I figured it out.😅

[@k4cperz_333]

I have the same batman cup

[@themainstreamsaltwater4353]

Subscribed!

[@9blizzy118]

Hey i have a similar problem, my aerox would start up and dies you give it some gas and dies anyway, doesn't start now do you think my piston rings could be fucked? When i got it it was running very rich.

[@mertkorkmazzzz]

Hey as you said in 11:20 that you dont want any water in your cilinder, but i made a mistake and just opened the cilinder and everything was meesed up. My piston is wet and idk what should i do. U have any advice for me?

[@danbelinger3904]

How can you unvent the air from the water system?

[@jakhy1198]

Fortmemes if you’re running a thermostat, you need to take your bike out to warm it up and get it up to temp. Then once the bike is up to temp the stat should open. Once this is done take the cap off of your coolant reservoir and elevate the front of the bike quite a lot(maybe 45 degrees) whilst the bike is running and then the trapped air will find its way to the coolant tank👍🏼

[@danbelinger3904]

@@jakhy1198 ok thank you

[@ivannovoselac3518]

What is the oem main crank bearings, koyo or skf? Steel cage or polyamide?

[@jakhy1198]

I believe they’re koyo and poly cages. But I’m not 100% sure. Koyo and Skf are great, I’d recommend steel caged

[@cloggman24]

Wagwarn to my savage filming

[@xdfunnyguylo8065]

can you use the 2 stroke bottle on a 70cc cylinder kit without it seizing?

[@jakhy1198]

So the flow rate would still be standard flow rate per rpm, but you’d have to consult the manufacturer to see if this would be suitable amount of oil for your kit. I premix to be safe in two aspects, I know exactly what ratio is going in and I also know there isn’t a pump to fail.

[@xdfunnyguylo8065]

@@jakhy1198 Thanks for the quick reply! Also, what size carburetor do you run for your 70cc setup? And do you have any recommendations for a good 70cc kit thats reliable but also fast?

[@jakhy1198]

@@xdfunnyguylo8065 I’ve used a whole range of carbs and kits, but currently I’m using a 19mm Dellorto PHBG, and a pm tuning single ring 70cc from PM directly. I’m getting quite impressive power out of this but also depends how you’ve got your transmission set up. Reliability wise the PM is great, but ultimately what it comes down to is care. Making sure to warm the engine up properly before riding and cooling it down correctly before turning it off, making sure you use a good quality 2t oil and also the correct safe 2t ratio. Also, it’s obvious but I’ll mention it, just don’t be pinning it for prolonged periods of time if yours is a high revving setup, I’d recommend getting a digital coolant gauge like I run and just keep and eye on it when you’re going to be heavy on the throttle for a longer period of time.

[@semprequevoceleroscomentar1063]

Man, my top speed on my aerox is just 80kmh max. What can i do to upgrade it to 100kmh?

[@semprequevoceleroscomentar1063]

Escape leo vince tt Clutch stage 6...

[@speedybikelife7475]

Get a stage6 MKII Full malossi pully yasuni c21 and boom you hit 130+ KM/H your welcome

[@winstonbanks1057]

Wow new video

[@tobo7752]

Instead of using car cleaner can I use break cleaner ?

[@jakhy1198]

Yes. I use brake cleaner on all my carbs

[@tobo7752]

@@jakhy1198 bit of a late reply aha , 10 months too late , I sold my Rox in December 😂

[@GewoonJelleYT]

Thanks m8! +1Subscriber!

[@999rickie1]

Nice vid!!!

[@tqm6943]

Is there much of a difference between the 50 & 70cc? considering doing it, kit is cheap, but is it worthwhile, mine is struggling badly on hills and is de-restricted.

[@areaclear]

Yea 70cc 60mph or over

[@tqm6943]

Cheers for that, how is fuel consumption post upgrade? It's drinking petrol as it is, i suspect due to the struggle on hills etc

[@areaclear]

@@tqm6943 well i'd say 0.5l per 10km. And it'll need a new carb and new jets and just make sure everything is set to make it run as good as it can. 70cc's can make up to 30hp with the right setup!

[@areaclear]

@@tqm6943 and probably a new exhaust, Yasuni carrera c16 i would recommened or a leovince zx or a zxr

[@krgeri0213]

But how did you pass the rings???

[@miige6923]

You should use br8hs on 50cc

[@gilbert.743]

Mate! I know it's a bit late, but jesus christ I cringed brutally hard at the part with the piston clips! do NOT reuse them!!! that is incredibly dangerous! If they were taken out once, replace them. Also, stick a towel into the engine while taking them out, i've had them spring into the bottom end!

[@jakhy1198]

Check the description.

[@gilbert.743]

@@jakhy1198 my bad mate, didn't Check. Good on you for actually taking criticism!

[@winstonbanks1057]

Hey with the dr70 did you run that on a normal crank mate

[@jakhy1198]

Winston Banks yep standard mate 👍🏼

[@ethanperry4844]

where’d you get that car adapter?

[@winstonbanks1057]

Hope you reply very good video

[@jakhy1198]

Winston Banks Thankyou very much mate

[@winstonbanks1057]

What carb you got on the dr 70

[@jakhy1198]

Winston Banks I’ve been running standard 12mm carb and when setup right it still really flies

[@winstonbanks1057]

Jakhy easy now I’m going to get one of them dr70

[@winstonbanks1057]

Why you gone back

[@jakhy1198]

Winston Banks I had to get a new thread put in the spark plug hole on the head, it’d stripped

[@shoominati23]

dont buy the Naraku head bolts! Junk! 2 snapped just torqueing to spec! I just used the longer nuts with the stock bolts in the end .. standard stuff is actually built stronger than people realise

[@jakhy1198]

shoominati23 yeah mate I know naruku are crap I wouldn’t use anything other that the top end gasket set

[@genoveser869]

lol in england do you also ride scooters? thought that is only in Germany spain and italy so the hype

[@sweetwater354]

in sweden we do it alot aswell :)

[@genoveser869]

@@sweetwater354 nice xd

[@tqm6943]

Ireland as well.

[@theatreofthedead4452]

Also in Finland, Norway, Denmark, Latvia, Greece, Turkey, France, Portugal...

[@davis9045]

Here in Latvia we have many scooter riders :D 90% of them are tuned 70cc engines,we even have scooter track racing here ;) and also we have scooter season opening and closing meetings.

[@cloggman24]

Wagwarn to my boot and all

[@sleepy5504]

yoo broski sold ur ped ? if not any new content comin soon>?

[@jakhy1198]

Still got it. What sort of content are you looking for?

[@nosayy3290]

@@jakhy1198 A video were you replace the old carb with a bigger one (17,5mm,19mm ect)

[@jakhy1198]

I do actually have a phbg 19mm to move up to, so when I do I will make a vid

[@nosayy3290]

@@jakhy1198 Cheers mate

[@dovydas4036]

What happens if the bolt snaps?

[@jakhy1198]

What bolt?

[@dovydas4036]

@@jakhy1198 Any bolt

[@dovydas4036]

@@jakhy1198 Like when you say be careful with it because it might snap

[@jakhy1198]

They you will need to somehow remove this bolt from the casing, plenty of methods on how to remove snapped bolts on KZbin.

[@winstonbanks1057]

Still no reply

[@scampi7514]

Does he reply, need help

[@jakhy1198]

He does.

[@georgejexter]

Hi mate whats ur insta?

[@jakhy1198]

J7KHY