Honda XR650L double extra wide front sprocket – Fatboy 21.3mm wide

One issue with the final drive system of the Honda XR650L is the thin ( 8.5MM ) front sprocket quickly wearing the output shaft leading to break downs way out there or a very costly repair. One way to reduce the wear on the output shaft is to use the wider ( 13.6MM ) front sprocket from a XR650R. Swaps like this usually result in a compromise. In this case the compromise is the XR650R sprocket must be installed in reverse and this causes a difficult installations process and a mis -alignment of the chain. Some riders report that this mis-alignment is not a huge issue given replacing the chain and sprockets is easier than rebuilding the motor to replace the output shaft. But, the mis-alignment will increase the friction in the chain drive system thus wearing the chain and sprockets out more quickly. This is especially true for bikes used daily on highways for commuting. Most everybody agrees they prefer to have the reduced output shaft wear without the mis-alignment.

The design of the FATBOY covers the ENTIRE countershaft splines so will give your countershaft a much longer life – probably for the entire time you own the bike.