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110cc Chinese Pit Bike Engine rebuild (Bottom End)
In This Video We Rebuild The Bottom End Of The Chinese 110cc Pitbike Engine.
Scott's Shed Im Just A Guy Who Likes Messing About With Motor Cycles
And Engines In My Spare Time.
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Пікірлер: 81
Thanks for recording and posting! Really helped me out with my project rebuilding two atvs for my kids.
@ScottsShed
2 жыл бұрын
Thanks for the comment 👍
its great to see how people use their own time to provide free education, Thank you
That brassy clutch washer you hold in your hand at 4:46, you must bend one of those 7 legs into the grove on the backnut ( once backnut is tightened). Otherwise it's gonna fall apart. It might take some time, but it will. Otherwise, a perfect video. Subscribed
If you can assemble like that first 2mins you done with with the bike 🚲 you are a free man 🤣😂
Going together well.
@ScottsShed
3 жыл бұрын
Hopefully finish it over the weekend 👍
Is this engine a fully auto or semi auto as I have a 90cc fully auto 4 stroke engine in my pit bike and I want to know what the clutch is.. if you can help thanks if not great video ! Have a good day!
@ScottsShed
Жыл бұрын
full auto at 5:12 in the video on the right side is the clutch witch i am working on thanks for the comment stay safe 🤘
Hey man I got a question if u could help me out what's the thing next to the bolt for the oil. I believe it's for the Cam but only two bottom bolts and ones for the oil and the other one has the part I need information on and help please and thak u
That is weird? I have never seen a pit bike with a reverse idler gear before. Are you sure that is not a 110cc atv engine???
My second was slipping, took it down & gears look just fine. Anyone have any suggestions. I need help.
I'm here trying to learn about engines. Your videos are a big help. Are any of the parts being put back together new or just cleaned up? Keep up the good work.
@ScottsShed
3 жыл бұрын
Some are new some a the old parts thanks for the nice words
helpful video lad
@ScottsShed
3 жыл бұрын
Thanks 😊
I've got a 125cc atv here semi auto with forward and reverse gear. Problem is it'll only go into reverse and neutral. The clutch plates are all worn away, do you think that would be the reason it wont go into forward drive? And if I bought a full new clutch basket with clutch plates init that would sort it or do you think the gears cogs could be knackered also. Thanks
@Jantata1337
2 ай бұрын
i have similar problem but here it doesn't want to go in reverse N and 1,2,3rd gear works just fine, any1 know where to look for the issue ?
Hey mate at the 8:30 mark what's the cylinder followed by a spring and a bolt I've undid mine by accident anything I need to know before reinstalling it? Thanks if you could help me out
@ScottsShed
2 жыл бұрын
It’s the cam chain tensioner
Transmission gear at 1:10 looks installed upside-down. The raised center part of the gear needs to ride on the center of the bearing.
Were did you find the internals for bottom end I've looked every were can't find for Chinese atv
@ScottsShed
Жыл бұрын
What u after I got most of mine from eBay
what inspired the bottom end rebuild? can’t get my pit to start and im contemplating doing the same thing
@ScottsShed
3 жыл бұрын
My engine was hard to turn over if u watch the tear down video on the channel u will see all the bearings was no good did yours just stop starting of was did it just get harder and harder to start
Hi mate I have a question I have a m2r 125cc and 1st 2nd 3rd gears are perfect when I go into 4th theirs nothing their it's like I've just hit Neutral why is this ?.
Hello, I want to know if a 110cc cylinder is compatible in a 90cc kazuma engine To increase power 
Hi i have some problems with shifting on 125,shoud be play on the shaft where the CLUTCH GEAR weel sits?🙏
@ScottsShed
2 жыл бұрын
The shaft what the clutch sits on ?
@FilipHnizdil
2 жыл бұрын
@@ScottsShed the other one on left, it looks like flyweel
@ScottsShed
2 жыл бұрын
@@FilipHnizdil no shouldn’t move think it will be the bearing
@FilipHnizdil
2 жыл бұрын
@@ScottsShed okay tnx
great video and informative i have a question i bought a used Baja dr90 that doesnt start after verifying the obvious other things to check and coming back good, i found out that the woodruff key was shattered including the crankshaft key slot and the flywheel slot. Everyone is telling me to NOT waste my time buying a new crankshaft and flywheel but im stuck on what to do i cant afford a new engine and buying used engine is also risky what would you recommend thank you
@ScottsShed
2 жыл бұрын
If you want to get the new parts and repair it if that’s some thing u can do then I would myself but up to you hope you sort some thing out 🤟
@IamSoloexplorer
2 жыл бұрын
@@ScottsShed I could do the repair, plus I need to learn how to fix a bike engine anyways since this is my first bike. It’s just a bummer when 95% of people say just buy a new engine……ok then I’ll be handing out my donation jar around lol
@ScottsShed
2 жыл бұрын
@@IamSoloexplorer loads of people thing a new engine is the best option but there not paying for it do I have two KZread accounts?
I know this video is old but by any chance do you know the gear tooth ratio for the clutch and clutch starter gear for a 125cc engine
@ScottsShed
2 жыл бұрын
Not sure but might have one I could measure
@cedricbrown2401
2 жыл бұрын
@@ScottsShed thanks id really appreciate it. I was trying to find out how many tooth they are for the 125cc
Hey man nice video! At 6:57 you install the arm What’s it called? I have mine apart (again). I replaced a kick starter shaft and got it all back together and running but it sounds like bearings clicking together all the way thru the gears. So took back apart and removed the arm and now it only clicks in neutral but once I shift into a gear noise goes away completely. 😂😂 very weird but any light you can shine would be awesome
@ScottsShed
Жыл бұрын
Clutch adjuster maybe that’s what the arm thing is for
Hi bro are that gaskets original, or it's made out of thin cardboard, or something else?
@ScottsShed
2 жыл бұрын
no there original my friend
Hey man do you how big of a big bore kit I can go on a no names 110cc engine?
Whats that gear called behind that triangle peice
@rambofan1
Жыл бұрын
The clutch?
What is the socket you used at 05:02 called?!!! I was trying to get this off without one and it was a nightmare 🤣
@ScottsShed
Жыл бұрын
It’s a castle nut socket can get them off eBay
Wonder if yer can help if possible iv stripped my 125 yx engine gear lever and kick keep jamming it was taken apart to change engine seals as I flooded it with oil the engine is new maybe 2 hours run if that iv taken the engine apart 7 times everything seems fine until I give it a kick and try to go threw the gears there’s only 1 gear after engine is out back together I have 1 washer about 3 mil thick left I can’t remember where it came from and your video doesn’t show the same parts as my engine any help is appreciated
@ScottsShed
2 жыл бұрын
If you remove the clutch cover can u turn the clutch by hand ?
@johncarroll9205
2 жыл бұрын
@@ScottsShed it did at 1 point I’ll have to take engine apart again as iv not long got last bolt in …. ( I think ) as I’m left with a washer about 3 mil thick and 1 screw with a washer but the screw could have been dropped from another engine
@johncarroll9205
2 жыл бұрын
@@ScottsShed I can turn it 1 way clock wise it’s giving a clicking noise
@ScottsShed
2 жыл бұрын
@@johncarroll9205 some thing is binding up as u take parts off try turning the engin each time then mite be able to find the problem are you from the uk ?
@johncarroll9205
2 жыл бұрын
@@ScottsShed yea from Scotland it’s like my gear cluster jams iv got ma clutch off and the cog behind the clutch … the arm inside engine that’s attached to gear lever seems to be disengaging itself
Where did you order you replacement parts, such as but not limited to the gaskets, bearings, etc
@ScottsShed
3 жыл бұрын
Form pit bike spares ltd and red circle motorcycles
hi, great video! should the piston have any play in it? mine does and im wondering if i need to do a rebuild
@ScottsShed
3 жыл бұрын
A small side to side movement is normal but only a Little
@Billybumkins
3 жыл бұрын
@@ScottsShed thanks for your reply mate! I'm wondering is it possible I can send you a video over? Maybe via email or something just to get a better opinion. I'm struggling like there's no tomorrow with my engine and it looks identical to yours in your video (although maybe not as clean lol)
@ScottsShed
3 жыл бұрын
Yeah no problem email in the about section
@Billybumkins
3 жыл бұрын
@@ScottsShed hi mate can't find the email so have dropped you an Instagram message 👍😊
Can you tell me the bolt size that bolts the starter to the motor mine snaped off
@ScottsShed
2 жыл бұрын
Witch one the ones that hold it to the engine ?
What is the piece called at the 3:21 mark????
@ScottsShed
2 жыл бұрын
shift drum stopper
@nateball-ri9nb
2 жыл бұрын
Mine seems to be broken. Bike only shifts to first. Any links to where I can find one? Got one off a parts motor from a friend and it is too short. Jams up. Thanks sooo much.
@ScottsShed
2 жыл бұрын
What engine is it for ?
where can i buy transmition parts
@ScottsShed
2 жыл бұрын
ebay or lots of online shops
Bro what that thing do at 8:35?
@ScottsShed
Жыл бұрын
cam chain tensioner
@lauriskruklis8338
Жыл бұрын
@@ScottsShed thanks. I accidently unsrewed it and thought that was the oil drain plug 😅 i just put it back, hopefully my bike wont brake😂
@ScottsShed
Жыл бұрын
@@lauriskruklis8338 just check your oil before use it 👌
@lauriskruklis8338
Жыл бұрын
@@ScottsShed how bad is it to drive it if you overfill it by half cm?
@ScottsShed
Жыл бұрын
Not really bad but would make sure it’s correct