The BSA A7-A10 Forum

Technical => Clutch, Primary, Gearbox => Topic started by: michael snellin on 18.11. 2012 16:52

Title: Chainwheel a10.
Post by: michael snellin on 18.11. 2012 16:52
Hi every one just wonderd how much play there should be on the assembled chain wheel only once i have fitted this part seems to be, if you like a bit floppy !!!!also how on earth do you lock the clutch washer on the  gearbox mainshaft.any help wil be much appreciated.
Title: Re: Chainwheel a10.
Post by: morris on 18.11. 2012 22:39
Hi Michael,

The subject has already been on the board a couple of times.
Here's one that might contain some information which may be helpful to you;,5800.msg39710.html#msg39710

(Muskrat posted an interesting technique on this thread *smile*)

The chainwheel (I suppose you mean the big chainwheel from the primary chain?) should be be tight, and not wobble at all.
Could be that the taper on the gearbox mainshaft and/or the taper of the clutch centre has worn out.
If it's the gearbox main shaft that's wobbly, probably the gearbox's bearings have worn.
I'm sure someone can add some more horror to this?

Anyway, have fun