multiply 4.6 by 128 which is oz in a gallon. divide by 10. 58.8:1 the oil pump is progressive so you will never get the exact same ratio every ride. when i have a wfo day, i'm looking for at least 40:1. ok with 32:1 but more than that is unnecessary imo, but 60:1 would make me nervous if i was seeing that on a regular basis, especially on a heavy throttle day. the highest i have seen is about 56:1 for a day and they included a substantial amount of trail riding. i will probably put a couple turns on the pump next time i have the airbox out. would much rather use a little more than not enough. they are still two strokes. they need the oil for lubrication. this has not changed just b/c the EPA has gotten involved...
pv