The thrust plate on my clutch (’31 TT Rep) is not flat. The driving face is dished (i.e. only the inner edge actually touches the next plate in). I assume it should actually be flat, but before I look into making it good, wanted to check.
Is there a preferred fix – presumably press it true again, rather than grind flat.
I hope this description makes sense!
The pressed/stamped pressure plates used from late 1926 to mid-1970s always were a bit ‘borderline’ in terms of stiffness and rigidity, especially when used with the stronger clutch springs used on TT Reps, Sprint Specials, etc.. The ‘works’ TT bikes that I have restored have a much stronger (steel) plate that is a machined-from-solid item, not a pressed/stamped effort.