MIKUNI Main Jet 4/042-640 for Optimal Carburetor Performance

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

The MIKUNI Main Jet 4/042-640 is engineered to deliver precise fuel metering for your carburetor system, ensuring smooth engine operation and reliable power delivery. Designed with high-quality materials, this main jet offers durability and consistent performance under a variety of operating conditions. Whether you're tuning for increased horsepower or improving fuel efficiency, this component helps you achieve optimal engine response.

The 4/042-640 main jet features a standardized size that fits a wide range of MIKUNI carburetors. Its compact design allows for easy installation and adjustment, making it suitable for both professional mechanics and DIY enthusiasts. Proper jet sizing is critical for maintaining the correct air-fuel mixture, and this jet provides the precision needed for fine-tuning your engine's performance.

Constructed to meet strict manufacturing standards, the MIKUNI Main Jet 4/042-640 ensures reliable operation over time. Its compatibility with various engine setups makes it a versatile choice for motorcycle, ATV, or small engine applications. When paired with other high-quality components, this main jet helps optimize your engine's efficiency, responsiveness, and overall performance, making it a valuable upgrade or replacement part for your vehicle.

Features:

• Engineered for precise fuel delivery in carburetor systems

• High-quality durable construction for long-lasting performance

• Standardized size fits a variety of MIKUNI carburetors

• Easy to install and adjust for optimal tuning

• Designed for use in motorcycles, ATVs, and small engines