+/- 2 Degree Flywheel Key -   This offset woodruff key allows you to add or retard your timing by two degrees.  Most engines will pick up some low end by adding timing while some highly modified engines with aftermarket ignitions will benefit from two degrees of timing removed allowing the engine to turn more RPM.   We have found adding two degrees of timing on mildly modified XR100 engines really helps with low end. 

Fits:

1992 + Honda XR/CRF80

1981 + Honda XR/CRF100