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Mikuni 4/042-270 Main Jet Large Hex Carburetor Metering Jet Jets

Part of: Mikuni Main Jet Large Hex Carburetor Metering Jet Jets

Other options in this family: Mikuni 4/042-160 Mikuni 4/042-300 Mikuni 4/042-560 Mikuni 4/042-500 Mikuni 4/042-80

Manufacturer

Picture for manufacturer Mikuni

Part Number

4/042-270
9 reviews
Sale Price

$5.26

In Stock (5)

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Usually delivered within 2 days

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Product Details

The Mikuni 4/042-270 is a precision main jet designed for accurate fuel metering in Mikuni carburetors. This large hex-style jet features the standard Mikuni 4/042 design used across most Mikuni carburetor applications in motorcycles, ATVs, snowmobiles, and other powersports vehicles.

Key Features:

  • Large hex head design for easy installation and removal
  • Precision-drilled orifice for consistent fuel metering
  • Compatible with most Mikuni carburetor models including VM, TM, and BST series
  • Brass construction for durability and corrosion resistance
  • Mikuni part number 4/042 series specification

Main jets control the fuel flow at mid to wide-open throttle positions and are critical for proper engine performance and tuning. The -270 designation indicates the specific orifice size, with larger numbers flowing more fuel. Proper jetting ensures optimal air-fuel mixture for maximum performance and engine reliability.

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Quick and easy

Lowest pricing i could find. Shipping was high for my liking, i used a coupon code to save 25% on shipping, so its about the same cost as competitors with free or less shipping cost.

fast and easy

So far so good

Shopping is easy!

What a good find, very satisfied. Good prices, good service. Will be ordering from Autoplicity in the future.

I purchased a Volant Cool Air Intake Kit for my truck. Autoplicity had the best prices by far! Shipping costs were very reasonable and my order shipped quickly. I'll order more from them in the future.

Awesome awesome awesome so glad I was able to get what I needed for such a great deal

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