Keihin

Keihin: A Legacy of Precision Fuel Delivery

Few names carry as much weight in the world of powersports and engine management as Keihin. Founded in Japan, Keihin built its reputation as a premier manufacturer of carburetors and fuel system components, supplying original equipment to some of the most respected motorcycle and powersports brands in the world — including Honda, Kawasaki, Yamaha, Suzuki, and KTM. Today, Keihin products are trusted by both OEM engineers and dedicated enthusiasts who demand precise, repeatable fuel delivery under a wide range of conditions.

Carburetors Engineered for Performance

Keihin's carburetor lineup is arguably the brand's most celebrated contribution to powersports. From the iconic CR Special smoothbore racing carburetor — known for its chrome-plated hollow slides and superior throttle response — to the versatile PE round-slide design that spans two-stroke and four-stroke applications, Keihin has long set the benchmark for carburetor engineering. The flat-slide PJ series, Keihin's first-generation flat-slide two-stroke carburetor, features an innovative dual-action enrichener and idle speed adjuster that made it a model of tunability for off-road and ATV riders. Whether you need an exact OEM replacement or a performance-oriented upgrade, Keihin carburetors offer a solution for a wide range of engine displacements and riding styles.

Carburetors & Accessories: Everything You Need to Tune Right

Getting the most from a carburetor often requires more than just the unit itself. Keihin's broad catalog of carburetors & accessories includes rebuild kits, needle jets, emulsion tubes, and other components that allow riders and mechanics to restore or fine-tune fuel delivery to factory specification — or beyond. Having access to genuine Keihin accessories means that the careful engineering built into every carburetor can be fully maintained over the life of the engine.

Jets: The Key to Air-Fuel Ratio Precision

Among the most important tuning components in any carburetor are its jets. Keihin produces an extensive range of main jets and pilot jets in multiple styles — including Small Round, Large Round, and Hex configurations — designed to precisely control fuel flow through the carburetor's circuits. Whether you're compensating for altitude, a new exhaust system, a high-flow air filter, or a big-bore engine kit, swapping jets is the most direct way to dial in your air-fuel ratio. Keihin jets are available across their PJ, PWK, FCR, PE, CR, and CVK carburetor families, covering a remarkable breadth of motorcycles, scooters, and off-road machines.

Why Keihin?

• Decades of OEM supply relationships with major motorcycle manufacturers worldwide
• A carburetor lineup covering two-stroke, four-stroke, racing, and street applications
• Precision-machined jets available in a wide range of sizes for accurate fuel tuning
• Genuine replacement parts that maintain the engineering integrity of the original design
• Trusted by professional racers and everyday riders alike

Whether you are restoring a vintage motorcycle, prepping a race machine, or simply maintaining your everyday ride, Keihin's fuel system components deliver the consistency and quality that serious riders have relied on for generations.