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Mikuni 4/042-300 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 4/042-560 Mikuni 4/042-500 Mikuni 4/042-80 Mikuni 4/042-270

Manufacturer

Picture for manufacturer Mikuni

Part Number

4/042-300
11 reviews
Sale Price

$5.26

In Stock (10+)

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Usually delivered within 2 days

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Fitment guaranteed

Fitment guaranteed

Product Details

The Mikuni 4/042-300 is a precision-engineered main jet designed for accurate fuel metering in Mikuni carburetors. This large hex-style jet features the traditional six-sided head for easy installation and removal with standard wrench tools.

Key Features:

  • Large hex head design for secure, easy installation
  • Precision orifice for consistent fuel flow
  • Direct replacement for Mikuni part number 4/042
  • Compatible with most Mikuni carburetor models
  • High-quality brass construction for durability and corrosion resistance

Main jets are critical carburetor components that control fuel delivery at higher throttle openings and RPM ranges. Changing jet sizes allows you to fine-tune air-fuel mixture for optimal performance, whether you're adjusting for altitude, temperature, exhaust modifications, or air filter changes. The large hex design is the most common style found in Mikuni VM, TM, and other popular carburetor series used in motorcycles, ATVs, snowmobiles, and personal watercraft.

Will do so later

Easy checkout, happy with description of parts ordered.Fast shipment

fast cheap and easy! plan to use again.

Parts were easy to find and the speed of website was fast.

Easy and Pleasant, Fast Shipping Great Product. THanks

i would like to now estimated delivery date.

ok

What I wanted at the best price available with free shipping, how can you go wrong.

the order was quick and inexpensive. I would have bought a carb if I could have found an Edlebrock I am not a holley fan sorry.

Simple and easy along with cheaper than the competitors!

Great prices

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