TL175 transmission problem

[Canajun]

Have a 1974 TL 125 that had been working quite well up until a few weeks ago when, all of a sudden, it wouldn't shift into 1st or 2nd. Started okay, but wouldn't shift.

If I forced it into 1st or 2nd while the engine was not running, the transmission locked up and the bike would not roll even with the clutch disengaged.

I pulled it all apart and checked the transmission. Seemed to be fine. No obviously damaged or broken parts. No excessive wear (at least to the naked eye). Everything seemed to engage/disengage just fine. Put it all back together - same problem. ?

Any ideas out there?

[zbnutcase]

Bent shift fork or a circlip that has jumped out of groove,allowing it to go into 2 gears at once, hence the lockup. 'nutcase

[Canajun]

Nutcase:

Thanks. I expected something like that but couldn't find anything amiss.

Nonetheless, this time I stripped it right down to the bare shafts, cleaned and inspected everything, and reassembled it making sure I had all the spacers in the right places, circlips fully seated, etc.

And now it seems to be working fine.

I don't know, perhaps some grit was keeping the shifter forks from sliding smoothly or something....