Very useful close ratio gear set from Takegawa for the XR100R and CRF100F. Comes with a 25 tooth countershaft 5th gear and 2 gears for the mainshaft 5th; 25 and 26 tooth. Brings 5th gear closer to 4th making it less of an overdrive that stock and mild builds can't rev out.

• changes 5th to either 1.000 or 0.962 (both gears included)