air leaks around the intake could also cause over-revving, over-tightening the bolts or nuts that hold the carb on can also cause the carb slide to bind.
i recently ressurrected a ca95 from a 20 year sit and can sympathize with how unnerving the over-revving can be.
i would think that damage to the insulator could also cause this.
i started mine with 7.2v ni-cad battery from a RC car. dont think it had enough to turn over the starter (half the recommended ah as the original) but shone the lights and fired it up nicely.
trying to scrounge up some 5mm bolts for the petcock (fun)
matt in PA
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