ummm, take the fuel filter off, thats completely useless anyways unless you change it all the time, completely take the carbs aparts and clean them...make sure the reeds arent broken and make sure that the floats are set correctly on both carbs, and make sure the airbox lid is on if its a mostly stock machine, too much air can make the carb bog down if the motor isnt set up for the open airbox.....other than that its gotta be internal in the motor....
1985 Honda ATC250R drag trike with s/t kit and full drag CR hybrid motor and drag chassis...
1986 Honda ATC250R daily rider fully modded engine, +4 swinger,etc...
1997 Polaris Storm 800 triple, boyesen reeds, dg individual silencers, 240 studs, 123mph on radar...