When I bought the new clutch, they pointed out to me that there was an apparent alignment issue with my old broken clutch. I therefore decided to measure everything and check it all out.
I am not sure if this is an issue as I cannot locate a spec for it. I measured the runout on the friction surface of the newly machined flywheel - mounted the magnetic base on the end of the head and touched the tip of the dial indicator onto the flywheel face at around the halfway point of where the clutch friction material runs. I found that I have 0.19mm of runout which I feel is quite large.
As a check I pulled teh flywheel back off and measured the runout of the crank face. This was 0.05mm.
Doing some triganometry then double checking using AutoCAD it appears that pretty much all of the 0.19mm flywheel runout is generated from the crank face runout (runout gets amplified the further out from the point of rotation).
Once clamped this runout will not cause the clutch any grief but it may upset the friction plate to input shaft splines. More triganometry and it appears that a 0.19mm deflection to the friction plate at 215mm from the centre will cause each end of the friction plate splines to move 0.76mm. I would have thought this would cause substantial wear and may be the cause of the wear to the splines in the old friction plate.
Question: As I said I cannot find a spec and have never bothered to measure this before so should I be looking to true this up or is it nothing to give another thought to? I cannot pull the crank out so the only option would be to shim between the flywheel and crank with a 0.05mm shim???
PS - I realise I am sounding like an old hypochondriac lately but I really am thinking about the detail of this new build-up - 1 chance to get things 100%
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