MIKUNI Main Jet 4/042-390 for Optimal Carburetor Performance

Large hex type used in most Mikuni carburetors. Mikuni # 4/042.

The MIKUNI Main Jet 4/042-390 is engineered to deliver precise fuel flow for optimal engine performance. Designed with high-quality materials, this main jet ensures consistent fuel delivery across various operating conditions, making it an essential component for motorcycle and ATV carburetors. Its reliable construction helps maintain engine efficiency and responsiveness, contributing to smoother acceleration and improved power output. Installation is straightforward, and the durable design ensures long-lasting performance even under demanding usage.
The 4/042-390 model fits a range of MIKUNI carburetors, providing a perfect solution for tuning and maintenance. Whether you're restoring a vintage bike or fine-tuning a high-performance machine, this main jet offers the accuracy needed for fine adjustments. Its compact size and precise manufacturing help maintain the integrity of your carburetor’s fuel system, preventing issues like fuel starvation or flooding. Trust MIKUNI’s quality to keep your engine running at peak performance with this reliable main jet.

Features:

• Engineered for precise fuel delivery to optimize engine performance

• Manufactured with durable materials for long-lasting reliability

• Compatible with a range of MIKUNI carburetors for versatile use

• Designed to improve throttle response and power output

• Easy to install, ideal for tuning and maintenance