i was told when i purchased my banshee that it had 20cc domes and tm32 carbs and therefore i could run pump gas with no problem, well upon teardown for a top end rebuild after a 70/90 compression test i have verified that what i actually have are 18cc domes and mikuni t34 carbs. now my understanding is that with 18cc domes i should be running race fuel, correct?. and if so what octane should i be running?