The kickstart quadrant where it fits into the bush should have an O.D of 1.1855" - 1.1865"...The clearance between the quadrant and the bush should be .0005" - .0025"...

The quadrant is entirely supported by the steel bush..I have seen bushes fitted in the back but that's not a standard feature...
Rounding off the edges of the quadrant where the 'hook' of the kickstart spring fits may be beneficial though I don't recall seeing a spring broken there..They usually fail in the spring windings themselves (and even that is a rare occurrence)...Interestingly, the small screw that retains the other end of the kickstart spring through the 'eye' of the spring and the outer cover was also hardened as standard...

I don't have the outside diameter of the kickstart bush but I'll measure one later today...I should think an interference fit of .001"- .002" in the cover would be OK with the cover being heated to fit the bush...Ian

email (option): ian@wright52.plus.com

I measured 3 NOS bushes and they all have an O.D of 1.438"...Ian

email (option): ian@wright52.plus.com

Thanks Ian.

email (option): pes.sales@btconnect.com

I ran a few of these with an O-ring groove. Available in over-sizes too.

email (option): pes.sales@btconnect.com