Mikuni Jet Needle - Hsr45 Leaner

Mikuni jet needle for HSR45 carburetors with a leaner taper specification, designed to reduce fuel flow and lean out the air-fuel mixture across the throttle range. Direct replacement for riders tuning carburetor performance on V-twin engines.

Features

• Leaner taper specification
• Direct replacement for HSR45 Mikuni carburetors
• Precise fuel metering across throttle range

Specifications

• Brand: Mikuni
• Manufacturer Part #: FJ8-8CFY02-98
• Length: 4.4 in
• Weight: 0.05 lbs
• Country of Origin: Japan

Fitment

Fits HSR45 Mikuni carburetors. This leaner taper needle is used to fine-tune air-fuel mixture on V-twin engines running HSR45 applications.

Frequently Asked Questions

What does a leaner jet needle do?

A leaner taper reduces fuel flow as the throttle opens, leaning out the air-fuel ratio for higher RPM operation — useful for correcting over-rich conditions.

Will this fit my HSR45 carburetor?

Yes — this needle is a direct replacement for HSR45 Mikuni carburetors. Verify your carb model before ordering.

Do I need any other carburetor tuning parts?

Jet needles work alongside main jets and pilot jets. You may need to adjust other components depending on your engine and riding conditions.

How do I know if I need a leaner needle?

If your bike runs rich (black spark plugs, poor fuel economy, rough idle), a leaner needle taper can help. Consider a full carburetor tune for best results.