- Joined
- Apr 6, 2013
- Messages
- 1,452

Is there any difference between the two. Can they interchange?
Pretty certain, based on owning '62 and '64 slimline dommies, Norton used the 1/4 chain until '64 and then changed for '65. I think in '64 they added the key lock to the top yoke and then in '65 went to 3/8 chain. "Incremental development." However, probably because the company (AMC) was in financial distress, specific component changeover dates are probably pretty meaningless.I have old catalogues from RGM and N*rvil.... Both used to list 1/4" and 3/8" chains though RGM's website no longer lists the former...
(but Andover do)