Description
Precise carburetor tuning separates a well-running engine from a truly dialed-in performance machine. The MIKUNI Needle Jet 990-793-004-Q-5 gives you granular control over fuel delivery in the critical 1/4-3/4 throttle range, where most street and track driving happens. This genuine Mikuni component is essential for anyone serious about optimizing their carb’s atomization and throttle response.
Needle jets are the tuning foundation of any Mikuni carburetor setup. By swapping needle jet sizes—identified by the series and size stamping on each unit—you can fine-tune air-fuel ratio without costly carb rebuilds or guesswork. This particular model (Q-5) offers a specific orifice diameter suited to particular jetting configurations; verify compatibility with your carb model and current setup before ordering.
- Genuine Mikuni component
- Made in Japan
- Size code: Q-5
- Series and size stamped
- Tuning range: 1/4–3/4 throttle
- Controls fuel atomization
- Bolt-in installation
- MPN: 990-793-004-Q-5






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