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Start ShoppingMIKUNI FVM11/22-155 Round Main Jet - High-Performance Brass Fuel Jet for Powersports Engines
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Description
Upgrade your powersports engine's fuel delivery system with the MIKUNI FVM11/22-155 Round Main Jet. This high-precision brass jet ensures consistent fuel flow for enhanced power, responsiveness, and reliable performance across a range of riding conditions.
Key Features
- 155 Size Jet: Precisely calibrated for optimal fuel-air mixture in carbureted engines.
- Brass Construction: Durable, corrosion-resistant material ensures long-lasting performance.
- Exact Dimensions: Clip height of 0.375 in (9.5 mm) and outer diameter of 0.236 in (6 mm) for perfect fitment.
- Lightweight Design: Just 0.1 oz (3 grams) for minimal impact on engine balance and fuel system dynamics.
Why Choose This Product
Whether you're tuning a motorcycle, ATV, or UTV, this MIKUNI Round Main Jet delivers unmatched precision. Its brass construction resists wear and maintains accuracy under extreme temperatures, while the precise dimensions ensure seamless integration with original equipment. The lightweight design reduces strain on fuel systems, and the 155 size provides the perfect balance between fuel flow and engine efficiency for power sports applications.
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Upgrade your powersports engine's fuel delivery system with the MIKUNI FVM11/22-155 Round Main Jet. This high-precision brass jet ensures consistent fuel flow for enhanced power, responsiveness, and reliable performance across a range of riding conditions.
Key Features
- 155 Size Jet: Precisely calibrated for optimal fuel-air mixture in carbureted engines.
- Brass Construction: Durable, corrosion-resistant material ensures long-lasting performance.
- Exact Dimensions: Clip height of 0.375 in (9.5 mm) and outer diameter of 0.236 in (6 mm) for perfect fitment.
- Lightweight Design: Just 0.1 oz (3 grams) for minimal impact on engine balance and fuel system dynamics.
Why Choose This Product
Whether you're tuning a motorcycle, ATV, or UTV, this MIKUNI Round Main Jet delivers unmatched precision. Its brass construction resists wear and maintains accuracy under extreme temperatures, while the precise dimensions ensure seamless integration with original equipment. The lightweight design reduces strain on fuel systems, and the 155 size provides the perfect balance between fuel flow and engine efficiency for power sports applications.| SKU | GMBA8C3EF0 |
|---|---|
| MPN | FVM11/22-155 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various Japanese | Keihin/PVM carbureted motorcycles, ATVs | 1980-2025 |
| Honda | XR250R, XR400R, CRF450R (pre-EFI) | 1990-2010 |
| Yamaha | YZ125/250, WR250/400/426/450 | 1985-2020 |
Frequently Asked Questions
Fits Mikuni VM series (VM26/VM34), Keihin PJ38/PWK33/36 carbs on 125-450cc 2-stroke/4-stroke bikes.
Use plug chop method: rich = larger jet, lean = smaller. Start with OEM size and adjust 2-5 sizes based on mods/elevation.
Yes, FVM series are round style; square are BS30/VM30-VM26 types. Check your carb needle jet recess.
No, this is for carbureted engines only.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Small flathead screwdriver
- Jet cleaning wire or carb cleaner
Pro Tips
- Remove carb, unscrew old jet with screwdriver, note float height. Clean thoroughly. Test plug chop method for tuning confirmation
Common Mistakes to Avoid
- Not cleaning carb passages before install
- Incorrect jet size selection without tuning
Comparison vs Stock/OEM
Direct OEM equivalent or replacement for worn factory jets
Improvements
- Precise fuel metering for optimal A/F ratio
- Consistent flow after cleaning
- Ideal for elevation/mods
Considerations
- Requires dyno/tuning knowledge for best results
Durability & Warranty
Expected Lifespan
Engine rebuild or 5+ years with proper cleaning
Warranty
Limited manufacturer defect warranty (contact retailer)
Maintenance
Clean with carb cleaner every 10-20 hours; inspect for wear/clogging
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