29. Now, while rotating the mainshaft, turn the shift drum clockwise until the 2nd gear position is reached. Stop at the point where maximum engagement is encountered. Again, at least 75% engagement is necessary.

30. Continue through the gears, checking each one for its maximum point of engagement.

NOTE: Because of the spacer you made for the mainshaft, you will not be able to engage 5th gear properly. For the time being, 5th gear will be disregarded.

31. If any gear position shows insufficient or excessive gear engagement, several possibilities exist.

(a) A BENT SHIFT FORK. In the case of a bent fork, the gear or sliding dog on that fork would slide too far in one direction and not far enough in the other.

(b) SHIFT DRUM SHIMMED TOO FAR IN ONE DIRECTION. In this case, all the sliding dogs and gears on all the shafts would slide too far in one direction, and not far enough in the other. This can be changed by moving the shims from one side of the drum to the other, until the engagement of the sliding gears and dogs is equally divided in both directions.

 

FIG. 58

(c) MAINSHAFT SHIMMED TOO FAR IN ONE DIRECTION. This is easily detected on the mainshaft, as both sliding engaging devices will engage too far in one direction and not far enough in the other, but at the same time, the engagement in both directions on the layshaft is good. This would require a readjustment of the