Hi, my 2004 seems to have an issue after riding for about 30 minutes. I had a leo vince full exhaust, 15k miles, and was wondering if it has anything to do with it. It seems after it passes 220F, 10 minutes later, the exhaust seems to rumble and I can feel less power. I was taking it home and it ended up dying and not wanting to start. After about 5 minutes, it started right up and seemed back to normal. Anyone know? Valve adjustments? Fueling issue?