My Account
My Garage
Shopping Cart
MY GARAGE Select Vehicle
MY GARAGE

Mikuni Main Jet Large Hex Brass Carburetor Metering Jet Jets

Manufacturer

Part Number

4 part numbers · from $27.01
Sale Price

from $27.01

In Stock (10+)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

Mikuni large hex main jets are brass carburetor metering jets. They let you fine-tune the fuel mixture at wide-open throttle and upper midrange. Tuners often call them main jets, carb jets or fuel jets. They suit motorcycle, ATV, snowmobile, marine and other powersports carburetors that use the large hex Mikuni jet style.

Key Features:

  • Brass construction for durability and consistent fuel flow
  • Large hex head for easy installation and removal with a standard socket or wrench
  • Precision-calibrated metering orifice for accurate fuel delivery
  • Multiple jet sizes let you adjust for altitude, temperature, exhaust and intake modifications, and other tuning needs
  • Mikuni quality from a long-established carburetor manufacturer

Replacing a worn or incorrectly sized main jet helps restore performance and throttle response, and it helps you get the best air/fuel ratio for your setup. Choose the jet size that matches your carburetor and tuning requirements.

Select yours to see vehicle-specific options.

Select & Customize

4 items

$27.01
PART NUMBER: 4/042-155
In Stock (10+)
Usually delivered within 2 days
$27.01
PART NUMBER: 4/042-145
In Stock (10+)
Usually delivered within 2 days
$27.01
PART NUMBER: 4/042-125
In Stock (10)
Usually delivered within 2 days
$27.01
PART NUMBER: 4/042-95
1 left at this price
Usually delivered within 2 days

Select & Customize

Wish you had more in stock

Easy site

Very fair pricing.

Received as ordered. Thank you

Checking out was a breeze and delivery was quick! Will be using this website again.

MUST HAVE BY 9/16/2026

The product was just what I ordered and arrived ahead of scheduled delivery date. Thanks.

Share icon
Return Policy
Returns are easy at Autoplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy