Mikuni Large Round Main Jets - 4/PK #122.5

Mikuni large round main jets in size #122.5, sold as a 4-pack for carbureted V-twin motorcycles. These genuine Mikuni jets meter fuel at cruise and part-throttle conditions and are essential for dialing in proper air/fuel ratio on Harley and Indian carburetors.

Features

• Genuine Mikuni OEM jets
• Size #122.5 large round style
• 4-pack quantity
• Made in Japan

Specifications

• Brand: Mikuni
• Manufacturer Part #: FN100604-122.5
• Quantity: 4 per pack
• Jet Size: #122.5
• Style: Large round
• Length: 4.4 in
• Width: 2.2 in
• Height: 0.6 in
• Weight: 0.05 lbs
• Country of Origin: Japan

Fitment

Fits carbureted V-twin motorcycles including Harley-Davidson and Indian models equipped with Mikuni carburetors.

Frequently Asked Questions

What size jet do I need for my bike?

Jet sizing depends on altitude, air temperature, and carburetor setup. Consult your shop manual or carburetor documentation. This pack is #122.5 size.

Are these OEM Mikuni jets?

Yes — these are genuine Mikuni manufacturer jets, not aftermarket copies.

How many jets does my carb need?

Most V-twin carbs use one main jet. This 4-pack gives you spares for experimentation or future rebuilds.

Will these fit any carburetor?

These are for Mikuni carburetors only. Verify your bike uses a Mikuni carb before ordering — different brands use incompatible jet sizes and seats.