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Start ShoppingMIKUNI FVM11/22-55 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 FVM11/22-55 Round Main Jet. This high-quality brass jet delivers precise fuel flow control for enhanced performance and reliability in off-road and sport bikes.
Key Features
- Brass Construction: Durable, corrosion-resistant material ensures long-lasting performance in harsh riding conditions.
- 55mm Jet Size: Optimized fuel flow for maximum power output and efficient engine operation.
- Standard Mikuni FVM Series: Direct replacement for compatible carburetors with 0.25in diameter and 0.5in length dimensions.
- Negligible Weight: Ultra-light design minimizes strain on engine components without compromising performance.
Why Choose This Product
Whether you're modifying a dirt bike, ATV, or sport bike, this round main jet offers precise fuel metering for smoother throttle response and improved fuel efficiency. The brass material resists clogging and maintains consistent flow under varying temperatures, while its compact size ensures easy installation. Perfect for riders seeking reliable, high-performance fuel system upgrades without sacrificing engine longevity.
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Upgrade your powersports engine's fuel delivery system with the MIKUNI FVM11/22-55 Round Main Jet. This high-quality brass jet delivers precise fuel flow control for enhanced performance and reliability in off-road and sport bikes.
Key Features
- Brass Construction: Durable, corrosion-resistant material ensures long-lasting performance in harsh riding conditions.
- 55mm Jet Size: Optimized fuel flow for maximum power output and efficient engine operation.
- Standard Mikuni FVM Series: Direct replacement for compatible carburetors with 0.25in diameter and 0.5in length dimensions.
- Negligible Weight: Ultra-light design minimizes strain on engine components without compromising performance.
Why Choose This Product
Whether you're modifying a dirt bike, ATV, or sport bike, this round main jet offers precise fuel metering for smoother throttle response and improved fuel efficiency. The brass material resists clogging and maintains consistent flow under varying temperatures, while its compact size ensures easy installation. Perfect for riders seeking reliable, high-performance fuel system upgrades without sacrificing engine longevity.| SKU | GM54B4A8CD |
|---|---|
| MPN | FVM11/22-55 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various Japanese | Models using Mikuni VM/PF series carbs (e.g., Yamaha YZ, Honda CR, Kawasaki KX, Suzuki RM) | 1980-2025 |
| Honda | XR series (XR250R, XR400R, XR650R) | 1990-2010 |
| Yamaha | XT, TT, WR series | 1985-2020 |
Frequently Asked Questions
Fits Mikuni VM, PF, and compatible round-slide carbs (e.g., VM26, VM34, BS series). Check your carb model.
Yes, main jet controls fuel flow at mid-to-high throttle. Pair with pilot jet for full tuning.
FVM11/22 series are round orifice jets for specific Mikuni carbs; square jets (BS30/whatever) for others.
No, Keihin uses different jet sizing/threading. Mikuni-specific.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Small flathead screwdriver
- Jet wrench or needle nose pliers
Pro Tips
- Remove carb float bowl fully, clean jets/emulsion tube, note stock jet size before swapping
Common Mistakes to Avoid
- Dropping jet into carb body (hard to retrieve)
- Not cleaning carb before install
Comparison vs Stock/OEM
Direct OEM replacement or upgrade for worn jets; identical to factory Mikuni jets
Improvements
- Precise fuel metering for optimal air/fuel ratio
- New brass resists clogging better than worn stock
Considerations
- Must re-jet for mods like exhaust/air filter changes
Durability & Warranty
Expected Lifespan
2-5 years or 5,000+ hours with proper maintenance
Warranty
Limited lifetime (Mikuni standard for jets)
Maintenance
Inspect/clean during carb service (every 20-50 hours)
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