Mikuni 4/042-310 Carburetor Main Jet Large Hex Type Jets

The Mikuni 4/042-310 is a precision-engineered main jet designed for use in most Mikuni carburetors. This large hex-style metering jet features the standard Mikuni 4/042 configuration, making it a direct replacement component for tuning and rebuilding applications.

Key Features:

• Large hex design for easy installation and removal
• Precision orifice sizing for accurate fuel metering
• Compatible with most Mikuni carburetor models
• Genuine Mikuni replacement part (4/042 series)
• Essential component for carburetor tuning and adjustment

Main jets control the fuel flow at higher throttle openings and are critical for proper engine performance and tuning. This genuine Mikuni jet ensures accurate fuel delivery and reliable operation across various riding conditions. Ideal for rebuilds, performance tuning, or replacing worn components.