Mikuni 990-793-003-Q-0 166 Series Needle Jet for VM38 Round Slide Carburetor

The Mikuni 990-793-003-Q-0 is a genuine OEM 166 Series needle jet designed specifically for VM38 round slide spigot mount carburetors. This precision-machined brass component plays a critical role in carburetor tuning, controlling the fuel-to-air mixture in the quarter to three-quarter throttle range for optimal engine performance.

Key Features:

• Type 166 needle jet with Q-0 sizing specification
• Designed for VM38 round slide carburetors with spigot mounting
• Precision brass construction for consistent fuel metering
• Series and size stamping for easy identification
• Made in Japan to Mikuni's exacting quality standards

The needle jet works in conjunction with the jet needle to fine-tune carburetor performance during acceleration and mid-range operation. The Q-0 designation indicates a specific internal diameter—as the size code increases alphabetically and numerically, the internal diameter becomes larger, affecting fuel flow characteristics. This allows tuners to precisely dial in carburetor performance based on engine modifications, altitude, temperature, and riding conditions.

Genuine Mikuni replacement parts ensure proper fit and function, maintaining the performance and reliability your engine demands. Whether you're rebuilding a carburetor or fine-tuning for specific operating conditions, this authentic Mikuni needle jet delivers the precision metering needed for optimal throttle response and power delivery.