Take a look on the resources site, H series service bulletin on shifter stop pins, one is set (and probably bent), the other is adjustable eccentric outer diameter to adjust stop of the lever both ways).
If the bike ever fell over on the shifter side, it is quite possible the stop pin was bent during the encounter, upwards, allowing the shift claw to be offset in the direction of up shift. This would make it a bit harder to downshift easily. Either way, the pin to stop relationship is critical to getting the claw centered on the shifter drum pins in neutral.
Also, with shifter linkages between the short and shift levers, if they are set to the point the linkage hits a pipe, or other obstruction, shifting on one direction can be adversely effected, along with worn shift linkage/pins.
|