wow i remembered way off never trust my memory k still 80 cc thats not bad what if i got a c-70 engine probably honed out to 75-90cc does it count if i smoke 70. no i probably won't ever even touch 70. but i will dream so what are the rules
here is what i can think of
start with small cc bike
vintage and/or pedals (pedals can be removed)
thats it want to add to that