If the fuel tank is off the motorcycle, spray Berryman B-12 Chemtool Carb, Choke & Throttle Body Cleaner (part #0117) all over the inside and “slosh” it around. Allow a few minutes for the product to thoroughly penetrate. Drain the tank as much as possible and repeat the process until the spent product is clear and colorless. If the gas tank is still attached to the bike, use Berryman B-12 Chemtool Fuel Treatment (part #0116) but be careful not to spill it on any painted surfaces. Pour in ¼-½ of the can and either lay the bike on each side for several minutes or just do your best to slosh it around and/or splash it on the sides. Drain the tank as best as possible and repeat the procedure until the spent product is clear and colorless.