Gear box kit. Options on Ratios YX140, YX149, YX150, YX160, YX170. 2 Valve and 4 Valve. Needle roller or roller cases

Gear clusters YX125/140/160/170/4V needle roller or roller cases
Late type TI grade

Do not use with a worn or secondhand selector barrel

Red gears are different from standard

Close ratio             Close ratio lower 4th       Standard              Endurance tall 1st

1^st gear 13/34        1st gear 13/34                   1^stgear 11/36        1st gear 14/32

2^nd gear 17/29       2nd gear 17/29                 2^ndgear 16/ 31       2nd gear 17/29

3^rd gear 17/23        3rd gear 17/23                  3^rdgear 17/23        3rd gear 17/23

4^th gear 20/21        4th gear 19/21                   4^th gear 20/21       4th gear 20/21