Other Air Intake & Fuel Delivery
About Other Air Intake & Fuel Delivery
Reed valve sets, fuel controllers and other small air and fuel parts with no category of their own are filed in this mixed group. Listings include reed valve sets, fuel controllers such as the Power Commander and its auto-tune kits, air intake kits, choke plunger kits, air injection kits, vent tubing and a bracket for removing the air box. Riders come here to tune a bike after other changes, refresh a worn intake or find a small specific part.
A fuel controller plugs in between the bike's harness and its injectors and adjusts the fuel map, which matters after a change to the exhaust or air filter on a fuel-injected bike. Auto-tune kits add sensors so the map can adjust itself. Reed valves are one-way valves commonly found in two-stroke intakes, and reed sets come in materials such as carbon. Worn petals leave an engine hard to start and weak at low rpm. Each of these is model specific, so match the make, model and year, or use the Ride Finder at the top of the page.
Brands here include Cobra, Mikuni, Ciro, S&S Cycle, Dynojet and Arlen Ness. For the main intake and fuel parts, see Air Filters, Carburetors and Fuel Injectors, all within Air Intake & Fuel Delivery.
FAQs on intake and fuel delivery extras
When does a fuel-injected motorcycle need a fuel controller?
A fuel controller is worth considering when you change parts that alter airflow, such as the exhaust, air filter or an intake kit, and the stock fuel map no longer matches. Some changes need none. Follow the maker's notes for your bike, and use a map made for your model.
How is a fuel controller installed?
Many plug in line with the injector connectors without cutting the factory wiring, then connect to a computer or phone to load a map. Steps differ by model, so read the listing for supported bikes and follow the instructions supplied with the kit.
What does a reed valve do?
A reed valve is a one-way flap valve in the intake of many two-stroke engines. It opens to let the fuel-air mixture into the crankcase and closes to stop it flowing back. Worn or cracked reed petals cause hard starting and weak low-speed response, and a reed set replaces them.
Is it okay to remove the air box?
Removing the air box or changing the intake path alters how air reaches the engine and can lean out the mixture, so it usually calls for new jetting or a new fuel map. It can also let in water and dirt. Follow the maker's guidance and keep a quality filter on the intake.
