robs ss
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- Aug 16, 2016
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Helping a friend with his estart that suddenly just went whirrr.
Turned out to be the special nut that clamps the Bellville springs on the anti-backfire shaft (see part 9, lower left, below)
The body of the nut was fine but the "hexed" flange was broken off into 5 pieces meaning that it could no longer clamp the bellvilles.
Probably a previous history of backfires weakened this nut.
My questions to you are:
1. Has anyone else seen this failure and care to comment?
2. That "hexed" flange is quite thin (and weak), another under-engineering by Norton. Has anyone found a stronger after-market one?
Cheers
PS: I do know that that nut has to be tightened until the ball-clutch just clicks over at 50 ft ib (both directions)
Turned out to be the special nut that clamps the Bellville springs on the anti-backfire shaft (see part 9, lower left, below)
The body of the nut was fine but the "hexed" flange was broken off into 5 pieces meaning that it could no longer clamp the bellvilles.
Probably a previous history of backfires weakened this nut.
My questions to you are:
1. Has anyone else seen this failure and care to comment?
2. That "hexed" flange is quite thin (and weak), another under-engineering by Norton. Has anyone found a stronger after-market one?
Cheers
PS: I do know that that nut has to be tightened until the ball-clutch just clicks over at 50 ft ib (both directions)