B12 usage September 8, 2025 Solutions Central › Category: Throttle Body Cleaner | Fuel Additives / Treatments | Maintenance › B12 usage 0 Vote Up Vote Down Paul Moore asked 9 months ago How much B12 do I use per gallon of fuel in a motorcycle gas tank? 1 Answers 0 Vote Up Vote Down chemtooler Staff answered 9 months ago The recommended treatment ratio for Berryman B-12 Fuel Injector Cleaner (part #0116) is 1 oz per gallon of fuel. Please login or Register to submit your answer Username or Email Address Password Remember Me