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Originally Posted by riejurs1
90cc
that sounds good
what machining is required?
what is a rotax exhaust port?
does this mean a special exhaust is needed
i am assuming the 90cc kit will be the fastest, yes?
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Yes 90 cc Simonini is one of the best ! Rotax = one oval exhaust port and two auxilary exhaust port. Special exhaust i1n"t needed!
because of the londer stroke and bigger piston the crankcase needs larger bore!