Mikuni Jet Needle - Hsr42 Richest

Mikuni jet needle for HSR42 carburetor, calibrated to the richest setting for optimizing fuel delivery in the mid-range throttle range. Direct Mikuni OEM replacement part.

Features

• Richest calibration setting
• For HSR42 carburetor
• OEM Mikuni replacement

Specifications

• Brand: Mikuni
• Manufacturer Part #: FJ8-8DDY01-95
• Length: 4.7 in
• Width: 2.7 in
• Height: 0.4 in
• Weight: 0.05 lbs
• Country of Origin: Japan

Fitment

Fits Mikuni HSR42 carburetors. This needle is calibrated to the richest setting for mid-range throttle response optimization.

Frequently Asked Questions

What carburetor does this fit?

HSR42 Mikuni carburetors only. Check your carb model before ordering.

Is this the richest needle available for the HSR42?

Yes — this is the richest calibration setting. Leaner options are available as separate part numbers.

Will this require a rejet or tuning after installation?

Jet needle changes affect fuel delivery in the mid-range. Your bike may need a full carb tune-up for best results.