Mikuni Large Round Main Jets - 4/PK #185

Mikuni large round main jets, size #185, sold in a 4-pack for carbureted V-twin engines. These genuine OEM jets control fuel flow at cruise and part-throttle RPMs and are essential for proper jetting after intake or exhaust modifications.

Features

• Genuine Mikuni OEM jets
• Size #185 main jet
• 4-pack quantity
• For large round carburetors

Specifications

• Brand: Mikuni
• Manufacturer Part #: FN100604-185
• Quantity: 4 per pack
• Jet Size: #185
• Country of Origin: Japan

Fitment

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

Frequently Asked Questions

What size main jet do I need?

#185 is a mid-range main jet. Larger numbers (190, 195) run richer; smaller numbers (180, 175) run leaner. Verify your current jetting before ordering.

Will these fit my Harley-Davidson?

Yes, if your bike runs a Mikuni large round carburetor. Check your carb model and current jet size to confirm compatibility.

Why buy a 4-pack?

A 4-pack gives you spares for testing different jet sizes during tuning, or supplies for multiple bikes.

Do I need to rejet after upgrading my intake or exhaust?

Yes — any significant airflow modification typically requires rejetting to maintain proper fuel-air mixture and performance.