Quick question for a friends bike..

[sandman1976]

Ok my friend has bought some chinese pingpong Trialacross thing.
Only markings really say x-stream?
Its from a farm up the road from him so its been well bummed and probably never serviced!


Its spluttering when you wind it and not reaching full revs, also backfiring at higher revs, starts and runs on low revs lovely and you can ride it around as long as you dont want to blast it.
It seems to have a none chinese carb on it as the carb looks better quality to the rest of the engine.
Also the carb looks a bit naff fitted, but it ran fine for the first few hours, winding up to full revs and whizzing around without bother so the carb must be ok for the engine.

Im thinking: Air leak, Carb jets, or just a knackered carb?
I have taken the tank off, emptied it and cleaned it out with fresh petrol for him but thats about it.
Where would you guys start?

Thanks.

[The Shaggy D.A.]

[sandman1976]

Update,

Upon further inspection & a bit of goooogling it would seem its a kinroad xt125 engine, I have been searching for some form of workshop manual for download but having no luck.
Dont suppose anyone has one or knows of a download?

Thanks.

[MattWadz]

First things first, if your getting a spluttering problem, change to a brand new plug and make sure its correct for the bike, and then put some fresh fuel in it, and also, if your looking for a manual, just go for the haynes, its going to cost but its very good.

https://www.haynes.com/repairmanuals/kinroad/xt+125-19

Matt


____________________
Pitbike x2, Mini Moto x4, China Quad, 02' Suzuki AP50 > 03' MBK Nitro > 86' Suzuki GP100 > 02' Yamaha Jog R > 57' Honda Lead 100 > 95' Piaggio ZIP Rst 50 > 51' Suzuki TS50x > 83' Honda CB125TDE Twin > 51' Yamaha Aerox > 98' Kawasaki KX60 > 89' Yamaha DT50MX > 80's Honda QR50 > 05' CG clone > 125cc China Pitbike > 91' Honda MTX125 RW-L > 09' Peugeot Speedfight 2 LC LR > Lucky MX 140cc > Apache Tomahawk 50 Quad (current = 2010 Yamaha WR125R

[sandman1976]

Done the fresh fuel, done the plug so they can be eliminated.
i have just emailed him the link and told him to buy the manual.
Whats next on the agender would you say?

Thanks

[MattWadz]

is the bike jetted correctly for the air filter? i had that problem when i put a sports air filter on my friends old chinese ped, it was running badly, i upjetted it and it ran perfectly, thats just a guess as im not an expert, id say wait for a proffesional to answer your post, im not a professional, just an amateur

Matt
____________________
Pitbike x2, Mini Moto x4, China Quad, 02' Suzuki AP50 > 03' MBK Nitro > 86' Suzuki GP100 > 02' Yamaha Jog R > 57' Honda Lead 100 > 95' Piaggio ZIP Rst 50 > 51' Suzuki TS50x > 83' Honda CB125TDE Twin > 51' Yamaha Aerox > 98' Kawasaki KX60 > 89' Yamaha DT50MX > 80's Honda QR50 > 05' CG clone > 125cc China Pitbike > 91' Honda MTX125 RW-L > 09' Peugeot Speedfight 2 LC LR > Lucky MX 140cc > Apache Tomahawk 50 Quad (current = 2010 Yamaha WR125R