[SpudRider]

Yes, you can use the Yamaha, TW200, counter shaft (C/S) sprocket, or any aftermarket C/S sprocket designed for the Yamaha TW200. However, the Yamaha TW200 sprocket employs two 5x10mm bolts for the sprocket retainer, while the Zongshen 200GY-2 sprocket employs two 6x10mm bolts. Therefore, you will also need to purchase the smaller, 5x10mm bolts.

Please note, you are going to need to drain the engine oil, and remove the entire, left crankcase cover in order to replace the C/S sprocket. Therefore, I suggest you strongly consider doing the crankcase cover modification shown in the following thread.

http://www.chinariders.net/showthread.php?t=5081

I suggest you also purchase a new gasket for the left crankcase cover. You might damage the original gasket when you remove the cover.