I’ve got to disagree with you on ethanol Brian. If you keep your carb clean after every day at the track, you won’t have any problems. Rotax motors are tanks, and they are designed to handle 10% ethanol fuel. Guys here in the northeast run 93 pump almost exclusively and never have any ethanol related issues. The person I trust most in the karting industry loves pump gas for Rotax and thinks race gas is just a way for events to make a little extra money.