High performance / racing engines use racing components... e.g. forged pistons, chromium rings, etc. and they can withstand high internal stress... our scooters are are not built for high stress and if it will not damage your scoot immediately... it will for sure shorten it's life... One reason why racers use nitromethane aside from power is in order to have a rich mixture... nitromethane carries with it it's own oxygen molecules so it does not have to totally rely on atmospheric oxygen... rich mixture is a must for these racing engines to reduce temperature...
An Octane booster is just an anti-knock additive... Nitromethane is a racing fuel twice the power of ordinary gasoline...
Nitromethane cannot be used as a fuel additive.... racers usually use 90% nitromethane and 10% methanol... it needs methanol to stabilize it... Drag racers also change their oil every after run because nitro seeps thru the rings and contaminates your oil... Maybe a good additive would be nitro propane or propylene oxide instead....
Another thing is that nitromethane is a slower burning fuel... that's why you see those flames out the exhaust manifolds of those drag racers... put nitromethane in you scooter and the first you'll see is you muffler exploding....