How long have you had the bike? Have you done anything to it since you got it? If not, I would at least put in a fresh set of spark plugs and read the "how to" for adjusting your carb. If you still have issues, pull the carb and see what jets you are running. You may need to change those. Probably less than $15 to get new jets. I'm in the south and running 78/33 (main/intermediate) jets and have no issues in my '05 pitbull. If you really think it's a fuel issue, just empty the fuel tanks and put some fresh (always high octane) fuel. Take a look in your tank and make sure there's nothing floating around in there that might plug your filter, like the tank liner issues some have had. There's no reason to take your dog to a shop with all the help and info from this forum.