You are rite, my friend was working the GPS and it was set on KMH. I gave it a tune up fogged the carbs ect.. Took it to Santee cooper area over the week end to catch a few cats, and drag the girls around on a tube. So with my wife, myself and another couple on board along with some other gear, and a large cooler with the items needed to keep the sun at bay (beer, ect) + 25-30 gal of fuel and the GPS set on MPH she ran 45+ at 5200 rpm's. Makes me happy and handles nice, and the wife love's her so all is good.