Mikuni Large Round Main Jets - 4/PK #180

Mikuni large round main jets (#180 size) sold in a 4-pack for V-twin carburetor tuning. These genuine Mikuni jets are used to dial in fuel delivery at mid-range and full throttle on Harley-Davidson and Indian Motorcycle carburetors.

Features

• 4-pack of #180 main jets
• Genuine Mikuni OEM part
• Large round jet style
• Made in Japan

Specifications

• Brand: Mikuni
• Manufacturer Part #: FN100604-180
• Jet Size: #180
• Quantity: 4 per pack
• Length: 4.4 in
• Width: 2.2 in
• Height: 0.6 in
• Weight: 0.05 lbs
• Country of Origin: Japan

Fitment

Fits V-twin motorcycles with Mikuni carburetors, including Harley-Davidson and Indian Motorcycle models that use large round main jets.

Frequently Asked Questions

What size jet is this?

This is a #180 main jet — the larger round style used for mid-range and full-throttle fuel delivery tuning.

Why does the pack have 4 jets?

Four jets allow you to replace all carburetor positions on a twin-carb or quad-carb setup, plus keep a spare.

How do I know if I need a #180 or different size?

Jet selection depends on your carb model, altitude, and fuel mixture needs. Consult your carb manual or a tuning guide for your specific bike and setup.

Are these genuine Mikuni parts?

Yes — these are authentic Mikuni OEM jets manufactured in Japan, not reproductions or aftermarket copies.