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Start ShoppingMIKUNI FN100604-135 Large Round Main Jets - High-Performance Carburetor Jet for Powersports Engines
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Description
Upgrade your powersports engine's fuel delivery system with MIKUNI's FN100604-135 Large Round Main Jets. These precision-machined jets deliver consistent fuel flow for maximum power, efficiency, and engine longevity in motorcycles, ATVs, and other off-road vehicles.
Key Features
- High-Flow Design: Optimized fuel-air mixture for responsive throttle control and improved horsepower output.
- Durable Brass Construction: Resists corrosion and wear for long-lasting performance in harsh riding conditions.
- Exact Fitment: Precision-engineered for MIKUNI carburetor systems to ensure seamless integration and reliable operation.
- Easy Installation: Simple replacement for quick maintenance without requiring complex adjustments.
- Adjustable Fuel Flow: Fine-tune engine performance for different riding conditions and fuel requirements.
Why Choose This Product
MIKUNI's Large Round Main Jets deliver unmatched reliability and performance for powersports enthusiasts. The durable brass construction ensures consistent fuel delivery even under extreme temperatures, while the precise flow rate optimization enhances engine responsiveness and fuel efficiency. Whether you're tackling rugged terrain or racing on the track, these jets provide the critical fuel-air balance needed for peak power and smooth operation.
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Upgrade your powersports engine's fuel delivery system with MIKUNI's FN100604-135 Large Round Main Jets. These precision-machined jets deliver consistent fuel flow for maximum power, efficiency, and engine longevity in motorcycles, ATVs, and other off-road vehicles.
Key Features
- High-Flow Design: Optimized fuel-air mixture for responsive throttle control and improved horsepower output.
- Durable Brass Construction: Resists corrosion and wear for long-lasting performance in harsh riding conditions.
- Exact Fitment: Precision-engineered for MIKUNI carburetor systems to ensure seamless integration and reliable operation.
- Easy Installation: Simple replacement for quick maintenance without requiring complex adjustments.
- Adjustable Fuel Flow: Fine-tune engine performance for different riding conditions and fuel requirements.
Why Choose This Product
MIKUNI's Large Round Main Jets deliver unmatched reliability and performance for powersports enthusiasts. The durable brass construction ensures consistent fuel delivery even under extreme temperatures, while the precise flow rate optimization enhances engine responsiveness and fuel efficiency. Whether you're tackling rugged terrain or racing on the track, these jets provide the critical fuel-air balance needed for peak power and smooth operation.| SKU | GM27FB9614 |
|---|---|
| MPN | FN100604-135 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various Japanese | Carbureted motorcycles/ATVs (e.g., Honda XR series, Yamaha YZ/WR, Kawasaki KX, Suzuki RM) | 1980-2025 |
| Honda | CRF250R, CRF450R | 1990-2010 |
| Yamaha | XT250, TTR series | 1985-2020 |
Frequently Asked Questions
Fits Mikuni VM26-VM34, PF, BS series large round main jet position. Not for small round or Keihin stock.
Use jet kit chart based on altitude, temperature, mods (exhaust/air filter). Start with stock +5-10 sizes richer.
Mikuni is OEM supplier for many Japanese bikes; this is genuine Mikuni part.
Sometimes with adapter or conversion; check carb needle jet compatibility.
Installation Guide
Difficulty
Easy
Est. Time
10 min
Tools Required
- Small flathead screwdriver
- Jet cleaning wire or carb cleaner
Pro Tips
- Remove float bowl completely for access. Clean jet thoroughly. Test plug chop method for tuning confirmation
Common Mistakes to Avoid
- Not cleaning carb passages before install
- Incorrect jet size selection for altitude/temp
Comparison vs Stock/OEM
Genuine Mikuni often is the OEM; direct replacement
Improvements
- Precise fuel metering for tuned engines
- Consistent flow over worn OEM jets
Considerations
- Requires re-jetting for mods like exhaust or air intake
Durability & Warranty
Expected Lifespan
Indefinite with proper cleaning; replace if orifice erodes
Warranty
Limited manufacturer defect warranty (contact retailer)
Maintenance
Clean with carb cleaner every service; inspect for wear annually
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