do you even have a clip on heat sink. wow. 30 teeth. that seems big. but if you have not had any problems with it i guess it wouldnt hurt to try on a big track. i think ill bump my pinion up to 28t and ill also get a 27t and hell, y not get a 30t while im at it . trinitys new monster stock motor probaly has more rpm than the gm3. im not sure what the name is. i havent seen enough ads to get it lodged in my head. or mabey i knew and when i got my concussion i frogot . haha.