MIKUNI Radial Flat Slide Carburetor Set RS Series 34 4-Cylinder RS34D21K

Designed for inline four-cylinder performance to offer higher horsepower gains with the world's top motorcycle road race and drag race teams. Offer smooth, controllable throttle response with precise fuel-metering demands with high-volume fuel/air required by race engines. Flat throttle valve design provides the strongest signal for precise and instantaneous throttle response. Accelerator pump spray nozzle shoots fuel directly into the intake tract for immediate engine response. Check carb spacing to verify fitments; use spacing chart on how to check spacing. Float bowl vent allows atmospheric pressure into float bowl for fuel flow. Include adjustable accelerator pump and adjustable idle screw. Adjustable throttle return spring allows spring return pressure. Includes enrichment starter system for easier cold starting. Jet needle has easy adjustment slots for quick tuning. Use Genuine Mikuni jets and parts for best results. Made in Japan. Jetting may need to be changed per application, see chart for included jetting.. Larger-diameter spigot O.D.'s may require different mounting flanges.