yes on all except teh sleve and valves, neither of each. you can run from a stock 23cc to a fully modified and raceported reed caged 30.5 motor.

i try to use 93/94 octane fuels. other sue 103 - 110 Racing fuel too.
anything over 14:1 compression generally isnt good unless your going to be running alcohol for fuel.
hth
T