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You could still have a bad connection somewhere. I would take it back to your mechanic, especially if he is familiar with your bike. If he cannot help you out drop me an email and we will continue...

Hi schotte,
You may have an air leak around the carb. It sounds like a problem in that area. Take off the inlet manfold and make sure the gasket is in good condition then bolt everything up nice and...

Great report ChinaV, many thanks. To you too Carl for obtaining the hardware :thumbsup:
Now all we have to do is get one homologated for use in Europe. Here is Shandong Pioneers 250GY offering, I...

Gotcha.
Now then, it occurs to me there might ust be a big enough demand out there for cush drive hubs for the GY125/200 's to organise a shipment out of Shandong. Maybe even with a 44T sprocket....

Interesting stuff !
Thanks Forchetto, next time you are visiting this end of the Pyrenees I'll buy you a glass of Catalan beer!
The center hole is 58mm so the CB sprocket should fit perfectly. I'll...

Just a few more details to add on the rear sprocket: the four holes are on a 90mm diameter, 64mm between centers and take what appears to be an 8,2mm stud. I have scanned the drawngs in the 125cc...

Right, this is for the Sherlock Holmes amongst you. Here are some pics of the rear sprocket belonging to my Pioneer GY200. The number stamped on the back is 428-51T, pretty obviously a 428 pitch...

Its a 428, I had already checked and there are no tab washers. I am not sure if the sprocket is held in place by four bolts coming from behind the sprocket or if they are studs. Anyway I will check...

Hi Forchetto, Ian,
Thanks for the valuable info on drive sprockets, links and exhaust cans. I am a Brit living in France and ride a GY200 around the French Pyrenees. I too plan on changing the rear...