Motorcycle Air Intake & Fuel Systems

MOTORCYCLE AIR CLEANERS, BREATHER BOLTS AND FUEL SYSTEM PARTS FOR HARLEY-DAVIDSON AND TRIUMPH

The air intake and fuel system on a carbureted Harley-Davidson or Triumph is a collection of components that each affect how the motor breathes, fuels, and runs. The air cleaner sets the look of the carb side of the motor. The carburetor support bracket keeps the carb from flexing at the manifold under vibration. The breather bolts route crankcase vapors cleanly. The fuel line delivers clean, reliable fuel to the float bowl. This collection covers all of it across Harley-Davidson CV carb, S&S Super E and G, Ironhead, Evo Big Twin, and Triumph applications.

AIR CLEANERS

Lowbrow Customs makes louvered air cleaners for Harley-Davidson CV carb and EFI applications (1991 to 2020) in chrome and black — the most reviewed air cleaners in the collection at 72 to 77 reviews on chrome. S&S Super E and G versions of the same louvered design are also available. The finned air cleaner cover and fish scale cover fit S&S Super E and G carbs with semi-polished finish. Gasbox makes the 007 stainless air cleaner for 1991 to 2022 CV carb and EFI Harley-Davidson (32 reviews) and the Dog Dish air cleaner for the same application (21 reviews). Mooneyes spun aluminum MOON air cleaners cover CV and S&S Super E and G carbs. For Triumph, British Standard makes thread-on pancake air filters for Amal 900 series carbs and for TR6, T120, and T140 applications.

BREATHER BOLTS AND INTAKE HARDWARE

Lowbrow Customs radius breather bolts for Harley-Davidson Evo engines are the most reviewed item in the entire collection at 98 to 99 reviews in chrome, with black and brass versions also available. Twin Cam versions are stocked in chrome and brass. The FNA Custom Cycle Tite Seal intake manifold kit for 1948 to 1984 Harley Big Twins and Sportsters has 55 reviews and addresses the chronic intake leak problem on older Harley manifold connections. S&S Cycle carb manifold insulator blocks and O-ring intake seals cover sealing on S&S Super E setups.

CARBURETOR SUPPORT BRACKETS

Carburetor support brackets prevent the carb from flexing on the manifold under engine vibration — a common cause of carb body cracks and fuel leaks on older Harley builds. Gasbox makes brackets for Evo Sportsters (1991 to 2006, 20 to 49 reviews), Evo Big Twins (1985 to 1999, 21 reviews), and Ironhead Sportsters (1957 to 1985, 23 to 27 reviews).

FLOAT BOWL HARDWARE AND FUEL LINE

The Lowbrow Customs S&S Super E and G extended float bowl screws in brass are among the most reviewed items sitewide at over 100 reviews. They prevent cross-threading and make float bowl removal easier on an S&S-equipped build. Fast Eddy Co. float bowl drain valves cover S&S Super E, G, and B carbs, and Amal concentric carbs separately. For fuel delivery, Gates black rubber fuel and oil line is sold by the foot in 5/16 and 3/8-inch diameters. Cycle Standard translucent fuel line in 1/4 and 5/16-inch ID and braided stainless fuel line kits in both diameters cover builders who want the clean look on the fuel side. British Standard stock-style Triumph fuel line assemblies cover 1968 to 1970 and 1971 to 1978 T120 and T140 applications for restorations.

Browse motorcycle carburetors, motorcycle air cleaners and motorcycle petcocks for the full fuel system range.