My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Mikuni 4/042-280 Carburetor Main Jet Large Hex Jets

Part of: Mikuni Carburetor Main Jet Large Hex Type Jets

Other options in this family: Mikuni 4/042-110 Mikuni 4/042-230 Mikuni 4/042-60 Mikuni 4/042-150 Mikuni 4/042-170

Manufacturer

Picture for manufacturer Mikuni

Part Number

4/042-280
10 reviews
Sale Price

$5.26

In Stock (10)

delivery box

Usually delivered within 2 days

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Mikuni 4/042-280 is a precision-engineered main jet designed for use in most Mikuni carburetors. This jet controls the primary fuel metering at mid to wide-open throttle positions, making it essential for proper air-fuel mixture and engine performance tuning.

Key Features:

  • Large hex head design for easy installation and removal
  • Precision-drilled orifice for accurate fuel metering
  • Compatible with most Mikuni VM, TM, and HS series carburetors
  • Manufactured to strict OEM specifications
  • Brass construction for durability and corrosion resistance

This main jet is identified by the Mikuni base number 4/042 and is commonly used for carburetor tuning and rejetting applications. The large hex design allows for tool-assisted installation, ensuring proper torque and seal. Available in various jet sizes to accommodate different engine configurations and performance requirements.

Had to call customer service because I couldn't get paypal to work. He was very helpful and friendly.

Very Quick and easy Checkout..

thanks

Is been a great experience, just hope nothing goes wrong when I receive my part

Easy shopping. Will provide comments when I receive items.

So far so good

Very easy to navigate site

It was easiest and most responsible order I have ever experienced, and I am looking forward to do all my orders in future with your Co. Thanks autoplicity.

great and reliable

Good transaction.

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