Mikuni PHH Car Carburetor Jetting Size Recommendations from UpgradeMotoring.com!

Mikuni 40PHH and 44PHH Automotive Carburetor Jetting Size Recommendation Table

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Mikuni 40PHH - Mikuni 44PHH - Mikuni 50PHH

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The Mikuni Main Jet is for metering the amount of fuel required for medium and high speed driving, acceleration, as well as for climbing a slope.

The Mikuni Main Air Jet is designed to meter the amount of air. A change of the main air jet will affect the flow of fuel mainly at medium and high speed driving, resulting in change of output power.

The Mikuni Pilot Jet is used to regulate the fuel from "fully closed" to 20% throttle opening.

The Mikuni Pump Nozzle is designed to regulate the duration of fuel injection at acceleration.

Mikuni Racing PHH Carburetor Jetting Table from Upgrade Motoring.com

See Sizing Chart of Mikuni Jets, Needle Valves and Nozzles

Mikuni 40PHH - Mikuni 44PHH - Mikuni 50PHH

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