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Start ShoppingMIKUNI FN100604-97.5 Large Round Main Jets - High-Performance Fuel Flow Control for Powersports Engines
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Description
Upgrade your powersports engine's fuel delivery system with MIKUNI's FN100604-97.5 Large Round Main Jets. These precision-machined jets ensure consistent fuel flow, enhancing throttle response and power output for motorcycles, ATVs, and more. Ideal for riders seeking reliable performance tuning solutions.
Key Features
- Exact Fuel Flow Control: Precisely calibrated to match MIKUNI carburetor requirements, ensuring optimal air-fuel ratios for peak engine performance.
- High-Quality Construction: Durable brass alloy material resists corrosion and wear, ensuring long-lasting reliability in demanding off-road conditions.
- Easy Installation: Standardized design fits most MIKUNI carburetor models, simplifying replacement and maintenance tasks.
- Performance Optimization: Fine-tunes fuel delivery for improved horsepower, fuel efficiency, and smooth engine operation across RPM ranges.
Why Choose This Product
MIKUNI main jets deliver unmatched precision for fuel metering, making them essential for riders who demand consistent power and reliability. Whether you're modifying a high-performance engine or maintaining a stock setup, these jets provide the accuracy needed to achieve professional-grade results. Their corrosion-resistant construction ensures they withstand harsh environments, while the straightforward installation saves time and labor costs. Upgrade to MIKUNI's trusted components and experience smoother acceleration, better throttle control, and enhanced overall engine efficiency.
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Upgrade your powersports engine's fuel delivery system with MIKUNI's FN100604-97.5 Large Round Main Jets. These precision-machined jets ensure consistent fuel flow, enhancing throttle response and power output for motorcycles, ATVs, and more. Ideal for riders seeking reliable performance tuning solutions.
Key Features
- Exact Fuel Flow Control: Precisely calibrated to match MIKUNI carburetor requirements, ensuring optimal air-fuel ratios for peak engine performance.
- High-Quality Construction: Durable brass alloy material resists corrosion and wear, ensuring long-lasting reliability in demanding off-road conditions.
- Easy Installation: Standardized design fits most MIKUNI carburetor models, simplifying replacement and maintenance tasks.
- Performance Optimization: Fine-tunes fuel delivery for improved horsepower, fuel efficiency, and smooth engine operation across RPM ranges.
Why Choose This Product
MIKUNI main jets deliver unmatched precision for fuel metering, making them essential for riders who demand consistent power and reliability. Whether you're modifying a high-performance engine or maintaining a stock setup, these jets provide the accuracy needed to achieve professional-grade results. Their corrosion-resistant construction ensures they withstand harsh environments, while the straightforward installation saves time and labor costs. Upgrade to MIKUNI's trusted components and experience smoother acceleration, better throttle control, and enhanced overall engine efficiency.
| SKU | GM981B63C8 |
|---|---|
| MPN | FN100604-97.5 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Multiple | VM series, BS series, HSR series carburetors | 1980-2025 |
| Honda | CRF450R, CRF250R, XR400R, XR650R | 1990-2025 |
| Yamaha | YZ250F, YZ450F, WR250F, TTR125 | 1985-2025 |
| Kawasaki | KX250F, KX450F, KLX300 | 1990-2025 |
| Suzuki | RM250, RMZ450, DRZ400 | 1980-2025 |
Frequently Asked Questions
Fits most Mikuni VM26-VM40, BS32-42, HSR42/45 carbs with large round main jet port. Check your carb model.
Remove current main jet and read stamped number, or use jetting chart based on altitude, temperature, mods, and riding style.
Yes, OEM Mikuni part number FN100604-97.5. Avoid cheaper imitations.
Single jets good for fine-tuning known setups. Jet kits better for initial carb setup with multiple sizes.
Large round (5.8mm OD) for VM/BS carbs. Small round (4.7mm OD) for older round-slide carbs. Check your carb.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Small flathead screwdriver
- Carb cleaning brush
- Jet wrench (optional)
Pro Tips
- Always clean carb thoroughly before new jet install
- Verify float height after jet change
- Change main jet in .5 size increments for tuning
- Mark your original jet size before removal
Common Mistakes to Avoid
- Not cleaning carb passages before installing new jet
- Incorrect jet size for altitude/temp
- Damaging o-ring during removal
Comparison vs Stock/OEM
OEM replacement or performance upgrade from worn factory jet
Improvements
- Precise fuel delivery
- Restores factory performance
- Adjustable for mods/altitude
- Superior brass machining vs aftermarket
Considerations
- Proper sizing critical for performance
Durability & Warranty
Expected Lifespan
Indefinite with proper cleaning (carb service interval)
Warranty
Mikuni lifetime defect warranty
Maintenance
Remove and clean during every carb service (20-50 hours)
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