Mikuni Large Round Main Jets - 4/PK #157.5

Mikuni large round main jets (#157.5) for V-twin carburetors, sold in a 4-pack for tuning fuel delivery at mid-to-high throttle. Direct Mikuni OEM part distributed by Western Power Sports.

Features

• Genuine Mikuni large round design
• #157.5 jet size
• 4-pack quantity

Specifications

• Brand: Mikuni
• Manufacturer Part #: FN100604-157.5
• Quantity: 4 per pack
• Length: 4.5 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 using large round jet seats.

Frequently Asked Questions

What size jets are these?

#157.5 — a mid-range main jet for Mikuni carburetors tuned for higher throttle positions.

How many jets are in a pack?

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

Do I need a jet kit or tuner to install these?

No special tools required — jets swap directly into the carb body. Installation knowledge of your specific carb model is recommended.

Will these fit my Harley with stock Mikuni carbs?

If your Harley runs a Mikuni carburetor with large round jet seats, yes. Check your carb model and existing jet size before ordering.