I have a 01 F4i and I wasn't happy with the low end power, so I bought a new sprocket and went up 2 teeth. What size chain should I get? (the front sprocket is stock)[sm=shootshoot.gif]

 

you might be able to get away with the stock chain. Move your wheel all the way up and see if it goes, might be easier to take the front sprocket out too.

 

Unless it's a brand new bike you should never just replace one sprocket. Sprockets and chains wear in together and when you put one new one in the mix it will just eat everything up real fast since it's all out of wack now.

When i regeared I just got the RK/Vortex 520 kit that came with both sprokets and a chain.

If you want to take the gambel on running the stock chain then it should still fit if you adjust the wheel all the way back and the go from there.

 

Just buy a 120 length chain and adjust for size yourself. No need to guess and buy too short of a chain