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Start ShoppingMIKUNI Round Main Jet #120 - Precision Brass Jet for High-Performance Engines
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Description
Upgrade your carburetor's fuel delivery system with MIKUNI's precision-engineered Round Main Jet. This #120 brass jet ensures optimal fuel-air mixture for enhanced power, responsiveness, and engine efficiency in motorcycles and off-road vehicles.
Key Features
- Material: Durable brass construction resists corrosion and maintains consistent flow rates under extreme conditions
- Size: #120 jet diameter ensures precise fuel metering for high-performance engines
- Dimensions: 11mm outer diameter with 6.5mm inner diameter for perfect carburetor fitment
- Weight: 0.5g lightweight design allows for fine-tuned fuel delivery adjustments
- Compatibility: Designed for MIKUNI FVM11/22 carburetor models
Why Choose This Product
Whether you're tuning a racing bike or optimizing your off-road rig, this Round Main Jet delivers unmatched precision. The brass material ensures long-term reliability while the precise dimensions guarantee seamless integration with MIKUNI carburetors. Its lightweight construction allows for micro-adjustments to fuel flow, helping riders achieve peak engine performance across various riding conditions.
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Upgrade your carburetor's fuel delivery system with MIKUNI's precision-engineered Round Main Jet. This #120 brass jet ensures optimal fuel-air mixture for enhanced power, responsiveness, and engine efficiency in motorcycles and off-road vehicles.
Key Features
- Material: Durable brass construction resists corrosion and maintains consistent flow rates under extreme conditions
- Size: #120 jet diameter ensures precise fuel metering for high-performance engines
- Dimensions: 11mm outer diameter with 6.5mm inner diameter for perfect carburetor fitment
- Weight: 0.5g lightweight design allows for fine-tuned fuel delivery adjustments
- Compatibility: Designed for MIKUNI FVM11/22 carburetor models
Why Choose This Product
Whether you're tuning a racing bike or optimizing your off-road rig, this Round Main Jet delivers unmatched precision. The brass material ensures long-term reliability while the precise dimensions guarantee seamless integration with MIKUNI carburetors. Its lightweight construction allows for micro-adjustments to fuel flow, helping riders achieve peak engine performance across various riding conditions.| SKU | GMDB53A059 |
|---|---|
| MPN | FVM11/22-120 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various Japanese | Carbureted motorcycles/ATVs (Mikuni VM series carbs) | 1980-2025 |
| Suzuki | DR-Z400, RM250/450 | 1990-2010 |
| Honda | XR series, CRF250R/450R (pre-fuel injection) | 1985-2020 |
| Yamaha | TT-R, YZ series (2-stroke) | 1995-2015 |
| Kawasaki | KX series (2-stroke), KLX | 1980-2010 |
Frequently Asked Questions
Fits Mikuni round-style main jets for VM series carburetors (VM20-VM34). Check your carb model.
Use jetting charts based on altitude, temperature, mods (exhaust/air filter). Start with stock size and adjust.
Universal for both; used in many 2-stroke and 4-stroke Mikuni VM carbs.
Yes, most retailers sell packs of 5 or 10 for tuning multiple sizes.
This is round main jet (FVM series) for VM carbs; flat jets are for BS or TM series.
Installation Guide
Difficulty
Easy
Est. Time
10 min
Tools Required
- Small flathead screwdriver
- Jet needle tool or pick
Pro Tips
- Clean carb thoroughly first. Test plug chop method to verify jetting after install
Common Mistakes to Avoid
- Not cleaning carb passages before install
- Incorrect jet size selection for altitude/temp
Comparison vs Stock/OEM
Direct OEM replacement or upgrade for precise fuel metering
Improvements
- Consistent flow for better tuning
- High-quality brass vs cheaper alternatives
Considerations
- Must match exact carb model; not one-size-fits-all
Durability & Warranty
Expected Lifespan
Indefinite with proper cleaning; does not wear out
Warranty
Limited lifetime (manufacturer defect only)
Maintenance
Clean with carb cleaner during service; inspect for damage
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