I was advised that my clapped out gearbox [sidecar use] would work ok if I changed the equally knackered 6 spring clutch on my 1954 M21. I got the clutch kit from Kidderminster Cycles and all I had to do was shorten the pushrod slightly. Clutch is brilliant and the gearbox now acceptable. One has to make sure one gets the correct adaptor as the one for BSA twins is different.
All I need is that kit nothing else? So I’m guessing you do not need to utilize the single spring? I cannot read some of the stuff in that page. It’s not a bad deal if it works smoothly seeing I need to replace this anyways
You mean the clutch set from the Netherlands? Everything you need is in the kit. The clutch remains quite original. This set actually only replaces the central spring with smaller springs. And you get better clutch plates.
It is only important that you have the correct center nut. I had a shorter nut and therefore the clutch did not work properly. The seller helped me very well with this! There is also a manual with photos included.
He doesn't have a huge stock of clutches, so it's best to send an email.
I had to wait about 2 weeks until he had another batch ready.