My XRR is unplugged, full Moriwaki exhaust , drilled side panel, Edelbrock carb, 15/48 gearing, Maxxis IT Cross tires. I aired it out on some dirt roads today. At exactly 94mph (according to my Trailtech speedo) the bike starts to stutter as if it is running out of gas. Back it off just a little, say to 90mph, and it will run fine all day long. No other problems whatsoever. Is that the rev limiter?