Join Date: Jun 2019
Location: Edinburgh, , Scotland UK
Apologies, I made a mistake in the first post, the crank cases go together perfectly with just the crank. it is when a shim goes on I get the problem.
Will check the crank pin clearance tonight but it certainly feels good, very little side movement.
The new crank pin is the Samarin make, Nigel Lacey is happy with the brand and it looks great, come with the thrust washers etc which have all been fitted.
The old main bearing will not sit flush on the thrust face so must be some issue preventing seating.
With the crank installed with no shims I get at least 1mm end float, as soon as any shim goes in, the crank cases will not close, showing a gap about 1mm.
It appears to be an issue with the LH journal not allowing proper seating of bearings or shims.
I marked the journal and spun the old mains on it to see the contact area but I will be rocking it as I turn it so making little contact all the way but if held up to the light there is a gap between bearing and shim face.
Con rod alignment looks like I need to shim lots on LH side
second pic shows case gap with an original .32mm shim installed
Last edited by 250-1974; Jun 24th, 2019 at 10:47 am.