Countershaft gearbox for 140, 149, 150, 160, 170 TOKAWA V1

Updated to reduce the risk the 3nd gear leave out
Reinforced at the gear kick support and for the 3rd tooth
Mounting only with the updated drum reference 4121
 and the mainshaft reference 4833
For needles bearing assembly on the right side.
From left to right :
Ø66.5 / 36 teeths
Ø56.3 / 29 teeths
Ø49.9 / 23 teeths
Ø45.6 / 21 teeths