MIKUNI Main Jet 4/042-420 for Optimal Carburetor Performance

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

The MIKUNI Main Jet 4/042-420 is designed to enhance the fuel delivery system in your motorcycle or ATV. Crafted with precision, this main jet ensures your engine receives the correct amount of fuel at high RPMs, promoting smooth acceleration and reliable operation. Made from high-quality materials, it withstands extreme conditions and maintains consistent performance over time. Installing this main jet can help optimize your vehicle's power output and fuel efficiency, making it a vital component for enthusiasts and professionals alike.
Designed for compatibility with select MIKUNI carburetors, the 4/042-420 model is easy to install and replace, offering a straightforward upgrade for those looking to fine-tune their engine settings. Whether you're tuning for racing or everyday riding, this main jet provides the precision needed for optimal engine response. Its compact size makes it suitable for a wide range of applications, ensuring reliable fuel flow without adding bulk or complexity to your carburetor system.
Trust MIKUNI's reputation for quality and performance with this durable main jet. It is a cost-effective solution for maintaining or improving your vehicle's carburetor efficiency. Be sure to verify compatibility with your specific model to maximize benefits and ensure proper fitment.

Features:

• Designed for high-performance carburetor tuning

• Precision-engineered for accurate fuel delivery

• Durable construction withstands extreme conditions

• Easy to install and replace in compatible MIKUNI carburetors

• Optimizes engine power and fuel efficiency