Hello All,
I have a problem that has me baffled. I own a 1977 Triumph Bonneville. Recently I stripped the engine down to the connecting rods, but left in the gearbox, and took it to a trusted professional mechanic to have an exhaust cam shaft changed. When I installed and reassembled the engine, the gearbox and inner cover were already assembled, it ran like a clock but I could not get it to shift. The shift sequence would stop between gears, most of the time . So I stripped the gearbox down and inspected all parts for wear etc., replaced seals and reassembled it by the book. It still had the same problem. So I changed all the springs and the gear change quadrant assembly bushing in the outer cover including the plunger spring that rides on the cam plate. It still had the same problem. If I rotate the rear tire and move the shifter as far as it will go to select a gear most of the time it will not go into gear. Sometimes if I continue to push down on the shifter it will finally move a bit more and click into gear. Sometimes if the selector is released I’ll hear the cam plate click into position on its own and it’s in gear. Sometimes if I jiggle the shifter after moving it through an unsuccessful cycle it will click into gear. Very rarely it will shift through the sequence correctly. If anyone has any ideas please let me know.