MIKUNI Needle Jet 990-793-004-Q-6

Precise carburetor tuning is the foundation of reliable engine performance across the mid-range throttle spectrum, and the MIKUNI Needle Jet 990-793-004-Q-6 gives you the control to dial in your fuel mixture with surgical accuracy. Rather than guessing at jetting combinations, this genuine Mikuni component allows you to make repeatable, measurable adjustments at 1/4 to 3/4 throttle—the range where most engines spend their time. Whether you're chasing consistent power delivery on the track or perfecting street manners on a tuned build, a properly sized needle jet is non-negotiable for carburetor optimization.

• Genuine Mikuni manufacture
• Part number 990-793-004-Q-6
• Made in Japan
• Series and size stamped
• Size-coded alphabetically/numerically
• Mid-range throttle tuning
• 1/4–3/4 throttle adjustment
• Carburetor calibration component