Hey my little brother just bought a 2006 RM85 and it's fouling plugs like crazy. I just checked the reeds (everything was good), cleaned the carb (set the float), cleaned/oiled the air filter and installed a new BR10EG. Bike's running 91 octane mixed with full synthetic at 40:1. I taught him the proper way to warm up the bike also. When warming the bike up if you blip the throttle farther than 1/4 or right when you go to pull away, the bike will foul the plug. Any idea's on what I should check next?