MIKUNI 4/042-300 Hex Main Jets - High-Performance Fuel Jet Kit for Powersports Engines

Upgrade your powersports engine's performance with MIKUNI's 4/042-300 Hex Main Jets. These precision-machined fuel jets deliver precise fuel-air mixture control, ensuring smooth throttle response and maximum power output for a wide range of carbureted engines.

Key Features

• Hexagonal Design: Ensures secure fitment and easy adjustment for precise fuel metering
• High-Quality Steel: Durable construction resists corrosion and maintains accuracy under extreme operating conditions
• Universal Compatibility: Works with most MIKUNI carburetor models for versatile tuning applications
• Performance Optimization: Fine-tunes fuel delivery for improved engine efficiency and power output

Why Choose This Product

Whether you're modifying a dirt bike, ATV, or off-road scooter, these main jets provide the critical fuel flow control needed for peak performance. The hexagonal design simplifies adjustment while maintaining sealing integrity, and the durable steel construction ensures long-term reliability. Perfect for riders seeking precise fuel metering without compromising engine efficiency or power delivery.