It had #65's in it and I went down to #63's front and #55's rear. It idles the best it ever has and isn't rich at idle anymore as I'm not having to work the throttle to keep it running. Patrick had put #65's in it last time I sent it in for the same complaint. he says because I have such huge heads and carb on such small cubes the velocity at idle is very low. I need the carb though as this is a nitrous motor and runs its best times with this 1000 versus the 950hp i had on it.