i would not pay that, i just got a 95 warrior from a guy in palmer for $300 put a battery on it fired it up and my boy been riding the hell out of it but still need a rear shock
the only thing running race fuel on stock cc heads will hurt is you wallet and slight throttle response
i run a 50/50 mix in my supercharged RX1 and if i have any left after winter it goes in our quads