Dead Chinese GY6 scooter, engine rebuild

Free Chinese 125 cc scooter left for dead. can it be saved ? needs an engine rebuild , new cylinder head and gaskets, carburetor clean and jet change. possible zombie scooter build on the horizon
head bolts torqued to 20nn

[@_Urbalist6]

"This petrol look like A fine vintage cider"🤣🤣🤣🤣🤣

[@richardjweeks]

Didn't smell like it though 😱

[@黃凱德-w6d]

Excellent repair technology, even the GY6 motorcycle engine can be repaired.

[@黃聖霖-r4e]

Gy6神引擎😆

[@Manwichman]

God's got technology and engines that absolutely NO man nor angel upon this fallen world has! U can take that to the bank homie... No man made things rivals a thousandth thousand of 1% of what the Most High God has!

[@brayli86]

GY6 is relative easy to repair because there is not much inside. I did complete rebuild for less than 80€ and no experience. 4500km and still working.

[@thedaydreamer7972]

Good Job, I just rebuilt my top end today on a 150cc,,,,It would not start for a while,,,I fully charged the battery, hit it with carb cleaner and it fired right up,,,,,after the rebuild like this should you go slow on your bike for a while to break it in? Your video helped, TY again

[@richardjweeks]

Pleased it helped and thank you for the positive feedback. I hope you enjoyed working on your 150.

[@thedaydreamer7972]

@@richardjweeks TY RIchard, do I have to go slow with this scooter after the rebuild to break t in or can I ride it normally? TY

[@richardjweeks]

@@thedaydreamer7972 if you changed the piston and rings and or the cylinder, then it would probably be best to take it easy for the first 50 miles or so but if it's just a head lik mine was then you should be ok tho ride as normal as it won't need breaking in.

[@agustrimulyono5905]

Seal kruk as bagian kiri ukurannya berapa mas

[@mike-ology22]

We should add chinese subtitles to your videos and hopefully they listen and learn a thing or two ;). Thanks for sharing. I want to buy an old bike to repair. Tried a car to start on but think smaller engines would be better to learn.

[@richardjweeks]

Thanks for watching. Bikes are much easier to work on than cars, most parts fit on a bench.

[@Barry-r8n]

Great video. Thanks.

[@loll1974]

Great work great video

[@surapongcharnal]

Head Valve sound surrounding

[@davidcoates4852]

"Oh silicone, who uses silicone?" I know right, what's wrong with the good old cornflakes box?

[@moonliteX]

I think its silicone and not silicon 😅

[@richardjweeks]

@@moonliteX not if you're dyslexic

[@natvega1]

Thats the idea cheap, cheap parts, uses little gas, little oil, and can get you from one country to another for cheap, good cheap chinese.

[@jemro.2860]

Hello Mr How are you plese wiring Diagram system motorsykel lighting and lgnition sent for me thank you

[@mffpmffp404]

What is that noise on the starter

[@richardjweeks]

Not 100% sure but I think it's the one way clutch bearing. It's stopped mortgage noise now after a couple of months of use

[@colinsharp1314]

Great job Richard nice to see you back mate

[@richardjweeks]

Thank Colin. It's been a chaotic year at work with no let up. This project may be a little different from the last one. 😜

[@williambinfield5966]

Welcome back.

[@Marcoshaciendocosas]

Buen contenido. Justo estaba buscando para cambiar el cilindro, pero no se cual es el Torque de apriete de la culata

[@furgame4568]

0.5 mm intake 0.4 exhaust

[@karirautio]

NO, NO, NO. Intake 0,004 inch ( 0,102 mm) exhaust 0,005 inch (0,127 mm).

[@ronhoffman6806]

There are so many chinese scoots out there sitting around in back yards,barns,ect with very little wrong with them.

[@richardjweeks]

Good pickings for us to scoop up

[@andyshondaxlsrestorations4733]

Looks like you are having fun on this one no pressures no worries with this one. Nothing wrong with Chinese motorbikes ask Bill .Bill loves is one . Looking forward to see what you do with it

[@chelseag233]

Does cam chain guide rail go at the bottom of chain ive been looking for videos as ive just done top end rebuild now when you turn variator timing chain doesnt move just chain clicks as ive put cam chain guide rail at the top will this be why it isnt moving just clicking

[@richardjweeks]

hard to diagnose from what you have written. Cam chain guide goes in the bottom as per my video. It can't physically go anywhere else. Don't forget the cam chain tensioner as this is very important.

[@richardjweeks]

Sorry, there is a second guide on the top of the chain too, make sure it is facing in the right orientation

[@davesogn3329]

You didn't give us the torque spec of the bolts

[@richardjweeks]

Sorry. An oversight on my behalf

[@richardjweeks]

I have amended the description to include the torque setting.

[@rouewilliams4601]

Another video claimed 20 ft/lbs.

[@SG-wv7qu]

Where did you order your parts from

[@richardjweeks]

Cmpo, ( Chinese parts on line ) it's a UK based company in Exeter, good website and worth paying a couple of pounds more for the next day delivery.

[@snakepearson9433]

Thanks for the video and I like the part you talked about 150cc of Chinese power! 🤣 🤣

[@richardjweeks]

Your welcome 😁

[@MrMatt713]

Just cleaned the carb on my gy6 and it had the same green sludge... I don't know how

[@richardjweeks]

I'm thinking it's the methanol in the fuel. It has a habit of corroding the brass, brass contains copper and this could explain the green tint. Just a guess though.

[@mattandrade30]

How can you be sure at top dead, center and is it possible to be 180° out on the timing? Thanks.

[@richardjweeks]

If I remember correctly, it didn't matter. I think the CDI sparks on both the compression and exhaust stroke. Valve timing is set at the cam.

[@mattandrade30]

Thank you. I have a newer scooter that I’ve volunteered to fix. I’ve got it up and running and if I shut it off, it will start right back up. If it sits for a day, it will usually start back up. But if it sits for a few days, it will not unless I pull out the spark plug dry it off and then it will start up Initially. I thought it was a head gasket issue because there was no coolant in the scooter and then I put coolant in the scooter thinking that I was helping it but now I think that it may leak into the cylinder but seeing the head on your scooter, I think that there might not be coolant journals to the head And I might have oil leaking past the rings? Not sure. Thanks for your help!

[@mattandrade30]

Just as a quick diagnostic fix, I was going to try to drain the coolant again run it and then let it sit and see what happened. Unfortunately I used purple coolant because that’s all I had on hand at the time so it’s hard to tell the color I guess I could try smelling it.

[@azzdinehamlat9256]

Garage culbuteur R6 kojima moto

[@Marve_4427]

Whats the best values for the valves clearence,i think my scooter is too shaky when idle

[@richardjweeks]

0.1 mm for both valves

[@Marve_4427]

@@richardjweeks 🙏 thanks will adjust and see how it goes

[@dariusmocan4157]

good at how much power nm tighten the studs with the torque wrench nm

[@richardjweeks]

18nm

[@jeffmee763]

jet size is 105 for a 150cc on st air box.

[@richardjweeks]

Thank you. That sounds about right. Being a 125cc a slightly smaller jet makes sense.

[@johntray1462]

thank you

[@Fatehfat]

gy6 124/149 cc

[@richardjweeks]

125cc

[@gideonezenwobi2995]

How can I order for it

[@richardjweeks]

www.chinesemotorcyclepartsonline.co.uk/?gclid=CjwKCAjw7--KBhAMEiwAxfpkWN2jzAJw2W7cWm1cKJX_hYS5G-pN5hPs2gHqpzLR6ztGM7Raj2q2BxoC6ikQAvD_BwE