Topic: 500/4 selector drum and forks assem

[Steve Lu]

Can someone confirm for me if the gear selector drum needs to be in a precise location when you install the selector fork pins. The manual makes no remarks. Is it simply a case of dropping the pins in and the forks assume the correct position to line up with the gear clusters?
PS if anyone has a good method to remove tight selector pins, please share?
Thanks

[jakec]

If you have forks in the right order and orientation then they only go in one way and you can rotate the drum freely as you go installing the forks. Then just rotate to neutral once you’re done.

For the pins I pull them with needle nose, then for the little barrels I pull those out with a magnet.

[Steve Lu]

Thanks for your reply. I managed to remove the final pin last night and now back to start. I fitted the forks to the drum out of the cases to see where I went wrong. Pretty sure I'm on track now. I'm in process of installing a Nova 6 speed. I would have expected maybe a mark on the selector drum to indicate neutral. I'll recheck my photos.

[HondaMan]

Wow! Where did you find one of those 6-speed boxes?

[Oddjob]

Neutral is an indent in the face of the drum, it faces towards the large bolt in the upper crankcase as that's where the neutral selector aid used to be, a ball bearing sprung loaded. Since been superceded.

[bryanj]

Neutral detent is one of the rollers working on the face of the drum, the other drops into the pins and is gear detent.
The first neutral detent using the ball and spring down from the top was crap and modified.
The bulletin explaining the mod, allong with clutch mod is available on the uk site in ashs dropbox

[Oddjob]

The indent in the surface of the drum is still there though Bryan even if it’s no longer used.

[bryanj]

True, Ken but then it is a 350 twin part!