I'll tell ya this, years ago I set a Banshee for my kids. Same set-up as mine... same pipes, same air cleaner, same jets, same sprockets, same paddle tires, EVERYTHING. It literally burned twice as much fuel as mine did. Never could figure it out. We would top off every time at camp on our way out to the dunes, and get back and mine would take a splash compared to theirs. For a while I attributed it to they where riding harder than me, but at the time they were young and I was younger, so I don't think that was actually the case. To this day, a mystery.