Mikuni Large Round Main Jets - 4/PK #80

Mikuni large round main jets in #80 size, sold in a 4-pack for carburetor tuning on V-twin motorcycles. These genuine Mikuni jets control fuel flow at cruise and part-throttle engine speeds.

Features

• Genuine Mikuni OEM jets
• #80 main jet size
• 4-pack quantity
• Large round body style

Specifications

• Brand: Mikuni
• Manufacturer Part #: FN100604-80
• Jet Size: #80
• Quantity: 4 per pack
• Weight: 0.05 lbs
• Country of Origin: Japan

Fitment

Fits V-twin motorcycles equipped with Mikuni carburetors using large round main jets.

Frequently Asked Questions

How do I know what jet size I need?

#80 is a baseline size. Work with your carburetor tuner or Mikuni's jetting chart to match your engine and altitude. Larger numbers = richer fuel mixture.

Why would I need to change my main jet?

Main jet size adjusts fuel delivery at cruise and part-throttle. Changes are needed after intake or exhaust modifications, at different elevations, or for performance tuning.

Are these genuine Mikuni parts?

Yes — these are OEM Mikuni jets manufactured in Japan.

Will these fit any Mikuni carburetor?

Only carburetors that use the large round main jet body. Confirm your carb model accepts round jets before ordering.