I picked up an 05 BRP with 60 miles on it last week. After draining the fuel and getting it started with new gas, I rode it today and need advice. I'm at 5000' and the throttle has a bog in it at about 1/2 to full in 1st thru 5th. It goes up ok if I roll on slow, but if I open up like I would on my 600, it bogs and doesn't quite catch again. I think the main is a 125, and the pilot is 2 turns out. Could this be the bad gas still or just too rich? The airbox is unplugged, and it has the stock pipe insert. Thanks in advance for the help.