Mikuni

About Mikuni: A Century of Carburetion Excellence

Mikuni is one of the most storied names in powersports and automotive fuel delivery. Founded in 1920 and incorporated in its modern form in 1948, the company spent its earliest decades licensing and manufacturing carburetors for the burgeoning Japanese motorcycle and automobile industries. That deep-rooted engineering expertise helped Mikuni grow into a globally recognized manufacturer trusted by OEM builders and aftermarket tuners alike.

Mikuni carburetors and accessories are perhaps what the brand is best known for in the powersports world. Mikuni is one of the two most important names in motorcycle carburetion — alongside Keihin — with decades of OEM supply to Japanese motorcycle manufacturers and a strong aftermarket presence in race and rebuild applications. Whether you ride a vintage two-stroke, a modern ATV, or a big-twin cruiser, there is likely a Mikuni carburetor designed with your engine in mind.

Since 1968, Mikuni has been making parts designed to give you precise fuel mixture metering while still delivering smooth throttle response. Their lineup spans everything from the classic VM round-slide series to the flat-slide TM and the performance-focused HSR series. The brand's HSR-series carburetors are popular Harley-Davidson upgrades , proving that Mikuni's engineering reach extends well beyond Japanese-marque applications. Mikuni carburetors can be found in many two-wheelers by Suzuki, Honda, and Yamaha, not to mention aftermarket Mikuni carbs developed for V-twins by Harley-Davidson.

A Complete Ecosystem of Tuning Components

What sets Mikuni apart from many competitors is the depth of its supporting component lineup. Beyond the carburetors themselves, riders and technicians rely on Mikuni jet kits to dial in fuel delivery for altitude, climate, and performance modifications. Mikuni's range of carb parts includes jets, pocket tuners, rebuild kits, valve and seat assemblies, vacuum fuel pumps, float bowl screws, and more for Suzuki, Kawasaki, and Yamaha.

Precision tuning also depends on the smallest components. Mikuni carburetor needle and seat assemblies play a critical role in controlling fuel flow at idle and low throttle, and the brand offers these in multiple sizes and tip materials — including Viton — to suit everything from personal watercraft to vintage dirt bikes. When it comes to carburetor maintenance and setup, Mikuni carburetor tools are purpose-built to make the job cleaner and more accurate, reducing the guesswork that comes with jetting and tuning.

OEM Pedigree Meets Aftermarket Performance

Mikuni's reach extends far beyond a single product line. The company manufactures OEM parts for passenger and cargo vehicles, commercial vehicles, and general purpose engines, and is also an aerospace specialist with components found everywhere from the Boeing 777 to the Space Shuttle. Mikuni American Corporation, headquartered in Simi Valley, California, serves as the North American hub for both OEM supply and the aftermarket performance parts that enthusiasts depend on.

Mikuni American imports carburetors for the aftermarket for snowmobiles, personal watercraft, and motorcycles, enjoying a fair amount of success with its units for Harley-Davidson and similar big twins. Whether you are rebuilding a classic carbureted engine or chasing more power on a modern powersports machine, browsing Mikuni's carburetor catalog is a logical first step.