Just saying hey
Join Date: Nov 2004
Location: Kilmarnock, Strathclyde, Scotland
I, personally, would be worried if I had to have a reshim on an engine at 12000 miles. If valve clearances are out at that mileage it could have been carbon build up.
In any case, if it were my bike, I would first recalibrate the motronic injection, and if the problem persisted check the HT leads, plugs and because of the reshim, I would recommend a compression test too.
Just having plug gaps 50% too wide could ,alone, cause the symptoms..
Good luck anyway..