Non-Cush Hub Conversion?

B+Bogus said:

The only gearbox damage I've seen was on 850s, maybe a combination of greater torque causing more shaft flex, or poor hardening of the gear teeth - the 2nd gear pair on my Mk2A were badly spalled, and the new replacements went the same way within a couple of thousand miles..

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ludwig said:

It is the heavy clutch.

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Stephen Hill said:

Norman White thought the cush drive did nothing. Les Williams made a point of using them on his specials. Apparently opinions differ.

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Stephen Hill said:

I mis-typed when I referred to Les Williams (above) using the cush drive on his specials. I meant to say Les Emery used them on his specials. I just noticed he has passed away. For nostalgia's sake, check this out: https://sumpmagazine.com/classicbikespecialists/norvil-norton-commandos.htm

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