Wednesday, February 22, 2012

Norton Update: Primary (can of worms)

Lastnight I stripped out the Primary. I'd opened it up in the weekend with the idea I'd simply be putting my new rotor in, but holy shit have I opened a can of worms here! Jimmy was here when I opened it up and he pointed at that the clutch basket was rocking about on the mainshaft, I went and talked to Alastair Mears about that and he said it'd probably be the bearing in the clutch basket, so that'd be coming off too...

But first the rotor... here's my old one (still in the stator). You can see what a mess it is. There is one mark punched deeper than others (which are more sort of scratched in) but with a strobe it had been really hard to get a proper reading from this. Also I thought it was a bit worn because it was loose o the shaft.

Above is the new rotor I got from British Spares. It's too big anyway, so wasn't going to be going on. Luckily I figured that out before opening the bag an whatnot.

Shit went downhill quick when I pulled off the stator and the rotor came right off with it. The problem, I think, is that the keyway for the woodruff key that positions the rotor on the shaft is worn. I put a new key in, but the rotor can still rock backwards and forwards too much I reckon? I asked John, he seemed to think it might be ok because there's 80 pounds pf torque pressure keeping that done up on the shaft. I need to investigate this. Obviously I really do no want to have to do a total engine rebuild to fix keyway in the shaft!? I'm going to have to talk to people etc and find out what's to be done here..

There is also a leaking seal here where engine oil is getting through into the Primary (see below). How much does that matter? Is this maybe why my clutch ends up dragging after every few hundred miles?

The clutch mainshaft bearing is pretty worn I think (below). Will take that to school and test it out in a vice there tomorrow...

I am, at least, getting a lot faster at dismantling my whole primary side!

Will I ever get this bike on the road again? It's been 2 years now since I've really been able to ride it at all properly.

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