In my opinion you should rering that motor every year from a racing stand piont,the only diffrence is more maintnance,seals,rubbers,boots,fuel lines,all take a beating from alky.You need check everything good I have seen motors pop from fuel line rubbers stuck in carb,as far as mechanical there should be no big diffrence,my boy runs meth in everything including scooters,his banshee is 5 years strong on meth