Forum

[papasmurf]

It is possible to use a reamer with a morse taper on it, by reversing the two halves of a hand tap holder. (The ones held together with four screws) and clamp it on the tang of the reamer.

[scotty]

Whats wrong with sending them back to supplier as poorly machined parts. Have heard that gear oil will attack brass or bronze but not molybond attacking any metal

[JTL]

Adrian, you just explained why I wasn't able to do the link pasting right. Hope to remember for next time... I have access to a machineshop, so this coming Monday I'll bring all the different parts there for a "reamer talk". If they do not have a suitable reamer for the job, I'm sure I can find one on the net. I prefer to do the job by hand, but a lathe is ok too... thanks to everyone for input. When the job is done I'll give you an update... Jacob

[PeteF]

If you can get it in a lathe that would work. 0.1mm is a reasonable amount to bore out and you can also fine tune it with a bit of emery to get a clearance fit.

[JTL]

Well, I found a 23/32" reamer on eBay and gave the spindle a turn. The layshaft now goes into the bush in the spindle, but I'm not happy with the tolerance. I guess it's time for some fine tuning with emery grade 800 or 1000. The other end of the layshaft has a nice fit into the case end bush. I would like the spindle end to have the same easy feeling when turned in the bush... regards Jacob

[Bullet Whisperer]

Take care to get it right, Jacob. When a Bullet kickstart pedal starts going down when the bike is pulling hard, that is as a result of a very close fit of the layshaft in the kickstart spindle bush. In my youth, I once had the kickstart pedal on a Tiger Cub go all the way down to the footrest, before the whole plot locked solid and threw me off, thanks to a locked gearbox. That and my Brother's 100 mph off has made me very careful with gearboxes - for a split second, as you pull the clutch, you think it's all going to be ok, but when it stays locked up, you know how it's going to end ...

[JTL]

It's going in the right direction. Slowly the fit is getting better and better. So now it's just a question of time. I guess the trick is to stop working with the emery in time... Jacob

[Adrian]

Or finish the job by lapping in with metal polish, if you want to use a much finer abrasive? A.

[Tim NZ]

And fill the bronze with lapping compound...

[Dennis C]

Yes bronze is porous that's how it holds oil for lubrication, a nice bit of abrasive polish in there would soon give it plenty of clearance once you start riding.