BSA Owners' Club Forum

The BSA Workshop => Twins => Topic started by: shaun evans on 07 April, 2020, 18:54:57

Title: A50 Gearbox whine
Post by: shaun evans on 07 April, 2020, 18:54:57

Hello all,

At the back end of last year I noticed a whine from the gearbox when coming off the throttle on my 64' A50. Seem to remember it happened mostly in 2nd and 3rd gear. Stripped the box today and all seems well with no play in bearings/bushes, and no wear on pinons or shafts etc. Primary seems good too.

Any thoughts on this would be greatly appreciated.

Thanks....Shaun.

Title: Re: A50 Gearbox whine
Post by: Editor on 09 April, 2020, 19:34:08

The layshaft needle roller bearings are usually the culprits. That's why the noise is apparent in second and third when the layshaft is doing some work. Leave it long enough and first gear will start singing to you aswell. It's not disastrous as I've never heard of one breaking or seizing up so no need for an urgent fix.
Chris

Title: Re: A50 Gearbox whine
Post by: shaun evans on 09 April, 2020, 22:05:02

Thanks for that Chris.............................Shaun.