Norton 31691

Login Register. View Usage Statistics. Kathryn A. Some features of this site may not work without it. Issue Date Author Gorycki, Kathryn A. Publisher Taylor and Francis. Being in a blind hole it can be a bit difficult to get the bearing out, I use a suitably sized and ground off coach bolt head to provide a bit of encouragement to a stubborn bearing. One of the things I find difficult to understand is why its necessary to shim the layshaft for the roller bearing and NOT the ball bearing although rollers do need to be contained ,especially when we are told that the ball bearing needs to be a hand fit to the shaft,unless the ball bearing is wider than the roller.

Then it makes sense. Except then we should be shimming between the roller and the fixed gear,and not behind the kickstart. In any event If the bearings are the same width and a hand fit it makes no difference and the shaft needs shimming in both cases. And no the kickstart bush is not worn. I'm thinking of making up 2 equal shims, one to go in the kickstart shaft against or behind the bush and one against the roller. What do you think??. I don't think you should need to shim the layshaft for either the ball race or the roller.

Thanks James for the section detail. The only way to measure end float is with the Ks shaft and inner cover installed. The area that gives me concern is the junction between the third gear free pinion and the second gear ,at this point any axial loading from the shaft to the 3rd pinion is carried on a tiny area of the 3rd from the splined end of the shaft.

My gear has suffered here. There should not be much axial loading but any impact on the KS shaft intentional or accidental ends up here.

I am also curious about the fit of the fixed pinion at the end of the shaft against the 3rd gear, in my case this has to be driven on with a hammer and socket but with care to avoid trapping the 3rd gear.

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Delivery times may vary, especially during peak periods. Start of add to list layer. Sign in for more lists. X 25 Yds P80b Grit See original listing. No additional import charges at delivery!