Mikuni Large Round Main Jets - 4/PK #142.5

Mikuni large round main jets in size #142.5, sold in a 4-pack for V-twin carburetors. Genuine OEM Mikuni components trusted by Harley-Davidson and Indian Motorcycle riders for precise fuel metering.

Features

• Size #142.5 large round main jet
• 4-pack quantity
• Genuine Mikuni OEM part
• Made in Japan

Specifications

• Brand: Mikuni
• Manufacturer Part #: FN100604-142.5
• Jet Size: #142.5
• Quantity: 4 per pack
• Country of Origin: Japan

Fitment

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

Frequently Asked Questions

What size jet is this?

This is a #142.5 large round main jet — one size up from standard on Mikuni carbs.

How many jets are in a pack?

Four jets per pack — enough for a pair of carburetors with spares.

Will this work on my Harley carburetor?

Only if your Harley is fitted with a Mikuni carburetor. Stock Harley Keihin or S&S carbs use different jet designs.

What does a main jet do?

The main jet meters fuel at cruising and higher rpm throttle positions. Upsizing jets enriches the mixture for better performance or high-altitude riding.