Tired of stretching or even breaking the stock 420 size chain on your 07-08' CRF 150R?

This new 428 conversion kit from Drive Systems solves the problem especially on the modified or bigwheel models. 

Kit is complete with an AFAM chromoly steel 428 pitch countershaft sprocket, Drive Systems 428 pitch 7075-T6 black hard anodized alloy rear sprocket and a heavy duty D.I.D. gold 428NZ non-O'ring race chain with master link.