Description
Proper jetting is the foundation of carburetor tuning—get it wrong, and you’re leaving horsepower on the table or risking lean-condition damage. The MIKUNI Main Jet #90 delivers the precise fuel metering your engine needs for optimal performance across your power band. This 4-pack ensures you have spares on hand for testing, rebuilds, and quick adjustments without downtime.
If you’re running a Mikuni VM or TMX series carburetor, these jets are a direct replacement that requires no modifications—simply swap and tune. Whether you’re dialing in a 2-stroke dirt bike, ATV, or small-displacement performance engine, nailing the right jet size makes the difference between a crisp throttle response and a bogged-out bog.
- Quantity: 4-pack
- Jet Size: #90 main
- MPN: 4/042-90
- Fits: VM18, VM24-512, VM26-512, VM26-606, TMX series
- Material: Precision-machined brass
- Origin: Made in Japan
- Installation: Bolt-in, no modifications
- Application: Carburetor tuning, jetting optimization






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