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Re: Gear box shimming/bearing replacement
Posted: Wed Mar 30, 2016 9:05 pm
by rosscla
Was the endplate grooved like that when you put it in first time?
I'd be suspicious something was in there other than oil...
Re: Gear box shimming/bearing replacement
Posted: Wed Mar 30, 2016 9:24 pm
by Strummer10
Not sure if relevant to your issue, but my mates bike had a similar issue whereby the shim was gouged out. When we did the checks we found the end of the layshaft (endplate end) sat higher than the first gear cog, but Sticky's book says the first gear cog should be marginally higher than the shaft. This the shaft was biting into the shim. We changed the shaft over so it was correct and so far, so good.
Re: Gear box shimming/bearing replacement
Posted: Wed Mar 30, 2016 9:26 pm
by alanscottj
rosscla wrote:Was the endplate grooved like that when you put it in first time?
I'd be suspicious something was in there other than oil...
it wasn't perfect but tbh I can't remember. I can't see any foreign bodies in there, nothing, oil is clear too with nothing in it.
Re: Gear box shimming/bearing replacement
Posted: Wed Mar 30, 2016 10:00 pm
by rosscla
Strummer10 wrote:Not sure if relevant to your issue, but my mates bike had a similar issue whereby the shim was gouged out. When we did the checks we found the end of the layshaft (endplate end) sat higher than the first gear cog, but Sticky's book says the first gear cog should be marginally higher than the shaft. This the shaft was biting into the shim. We changed the shaft over so it was correct and so far, so good.
That's not a bad shout.
Re: Gear box shimming/bearing replacement
Posted: Wed Mar 30, 2016 10:20 pm
by alanscottj
rosscla wrote:Strummer10 wrote:Not sure if relevant to your issue, but my mates bike had a similar issue whereby the shim was gouged out. When we did the checks we found the end of the layshaft (endplate end) sat higher than the first gear cog, but Sticky's book says the first gear cog should be marginally higher than the shaft. This the shaft was biting into the shim. We changed the shaft over so it was correct and so far, so good.
That's not a bad shout.
Just been out and had a look, the first gear is higher, I remember checking that when I put it together. Had a look at the groove on the shim and it matches the edges of the first gear which leads me to think that I obviously didn't shim it properly, the shim must have been too thick. It's been ok for a few hundred miles and has gradually been rubbed down by the first gear and eventually hey presto it's no longer shimmed
Re: Gear box shimming/bearing replacement
Posted: Wed Mar 30, 2016 10:33 pm
by Muppet
fit a new bearing track in end plate new needle roller and shim
Re: Gear box shimming/bearing replacement
Posted: Wed Mar 30, 2016 10:43 pm
by alanscottj
Muppet wrote:fit a new bearing track in end plate new needle roller and shim
Will the bearing track need changing? It was a new one, it doesn't look like it has any damage?
Re: Gear box shimming/bearing replacement
Posted: Thu Mar 31, 2016 1:09 pm
by eden
Was the hub bearing all the way home?
Re: Gear box shimming/bearing replacement
Posted: Thu Mar 31, 2016 9:08 pm
by alanscottj
eden wrote:Was the hub bearing all the way home?
Yeah, hub hearing is seated right.
What is the best position for the rear wheel when rebuilding the gear box. The engine is in the frame, should I have the rear wheel on the floor or use the little jack to raise the wheel?
Re: Gear box shimming/bearing replacement
Posted: Sun Apr 03, 2016 6:08 am
by Strummer10
Alan, I suspect it makes no difference so long as the hub nut is correctly 'Torqued' to the values in 'Sticky's Book' as in reality the layshaft is kept nicely tight and horizontal between the hub bearing and endplate. I know some people use a metal spacer instead of putting the hub on and 'torquing up' .........