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sincere thanks.
this is all very helpful.
i'll keep you posted.
for now:
the carbs are in very good rebuilt condition.
it is possible that they got dirty while parked and failed, but, i doubt that is the problem.
i'm shopping for a good dizzy.
i'm fairly confident in the head rebuild i had done though this could be bad too.
i used, well, not the best pistons and cylinders. I can certainly imagine a case where a piston ring stuck and is causing a problem. if the compression and leakdown tests bear this out i'll pull the engine and invest better this time in pistons and cylinders. i think i have some original 912 cylinders. i've heard they are good to bore out and use with good quality oversized (forged?) pistons. but i don't want to go there unless i have to...
thanks again!
Adam.
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