Mikuni Large Round Main Jets - 4/PK #65

Mikuni large round main jets (#65) for V-twin carburetors, sold in a 4-pack. Direct OEM Mikuni part used to adjust fuel delivery in the midrange and cruise zones of Harley and Indian carb-equipped bikes.

Features

• Genuine Mikuni OEM part
• 4-pack quantity
• Jet size #65
• For large round Mikuni carburetors

Specifications

• Brand: Mikuni
• Manufacturer Part #: FN100604-65
• Quantity: 4 per pack
• Jet Size: #65
• Country of Origin: Japan

Fitment

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

Frequently Asked Questions

What does a main jet do?

The main jet controls fuel delivery in the midrange and cruise throttle positions. Changing jet size fine-tunes the air-fuel ratio for your riding conditions and altitude.

How do I know which jet size I need?

Jet selection depends on your bike's engine, carburetor tuning, intake, exhaust, and altitude. Consult your carburetor manual or tuning guide for your specific setup.

Are these OEM Mikuni parts?

Yes — genuine Mikuni jets manufactured in Japan and distributed by Western Power Sports.

Do I need any special tools to change the main jet?

You'll need basic hand tools to access your carburetor's float bowl and remove the old jet. Refer to your service manual for proper removal and installation steps.