Gear box shimming/bearing replacement

[alanscottj]

I've been running my new build TS1 in over the past month or so, noticed the other day that there was a tiny bit of play in the back wheel that wasn't there before and I could hear a bit of knocking. Due to the noise and the movement I decided to open her up and have a look before any real damage is done.

Took side off and clutch out and there was a bit of movement on the first gear, last time there was any play on the first gear it turned out to be a worn layshaft roller bearing, replaced that and it cured the bit of play. I then took off the endplate and was able to inspect the shim and gears. The gearbox shim has a nice gouge all around it (will get a photo in a bit) and it looks like there is a similar wear/gouging on the underside of the end plate where it meets the big shim.

My question is, would a worn layshaft roller bearing result in the wear/damage done to the shim? Or should I be looking for another cause? I am 100% sure that it was all shimmed up and measured properly when it was put together.

Any thoughts, as always appreciated

[garry inglis]

have you checked youre rear nut is tight as the layshaft could have moved

[alanscottj]

have you checked youre rear nut is tight as the layshaft could have moved

The rear nut has a locking plate around it with the screw loctighted in place so it wouldn't come loose....or would/could it?

[garry inglis]

well if it had the proper gap at setup something has moved up putting pressure on the top spacer and making the gouge as the enplate is in a fixed position it can not move down for the lip its fixed too

[alanscottj]

well if it had the proper gap at setup something has moved up putting pressure on the top spacer and making the gouge as the enplate is in a fixed position it can not move down for the lip its fixed too

Yeah something has moved. Here's some photos :



And the other side:



And the endplate:

[garry inglis]

that looks bad alan I think full strip down and reset everything that endplates had it

[a.lo.v2]

not sure if it has an effect but was the other small shim between layshaft and the end bearing there?

[Muppet]

fit a new bearing track in end plate new needle roller and shim

[alanscottj]

not sure if it has an effect but was the other small shim between layshaft and the end bearing there?

It was bud

[alanscottj]

fit a new bearing track in end plate new needle roller and shim

It'll need a rather thick shim eh?