Your cart is empty
Start ShoppingMIKUNI FN100604-65 Large Round Main Jets - Precision Fuel Delivery for High-Performance Engines
Fits your
May not fit your
Description
Enhance your engine's performance with MIKUNI's Large Round Main Jets, engineered for precise fuel metering in high-output powersports engines. These durable jets ensure consistent fuel flow, improving throttle response and power delivery across a wide range of operating conditions.
Key Features
- High-Precision Machining: CNC-finished brass construction ensures accurate fuel flow rates for optimal engine performance.
- Universal Compatibility: Designed to fit standard MIKUNI carburetor setups, ideal for motorcycles, ATVs, and off-road vehicles.
- Corrosion-Resistant Material: Premium brass construction withstands harsh environments and prolonged use without degradation.
- Easy Adjustability: Standard jet sizing allows for simple tuning to match specific engine requirements.
Why Choose This Product
MIKUNI's Large Round Main Jets deliver reliable fuel delivery for riders demanding peak performance. The precision-engineered design minimizes fuel waste while maintaining consistent air-fuel ratios, enhancing engine efficiency and power output. Whether you're modifying a high-performance engine or optimizing stock setups, these jets provide the accuracy needed for professional-level results. Their durable construction ensures long-term reliability, making them a trusted choice for serious powersports enthusiasts.
Delivery
Checking availability...
Estimated arrival
Order within to ship today
Orders ship
Shipping to
Enter your ZIP code for delivery estimate
Price Match Guarantee
Found it cheaper?
Log in to submit a price match request.
Price
Quantity
Free Shipping $100+
14-Day Returns
Secure Checkout
Price Match
Complete the Build
This item
$21.85
In Cart
Enhance your engine's performance with MIKUNI's Large Round Main Jets, engineered for precise fuel metering in high-output powersports engines. These durable jets ensure consistent fuel flow, improving throttle response and power delivery across a wide range of operating conditions.
Key Features
- High-Precision Machining: CNC-finished brass construction ensures accurate fuel flow rates for optimal engine performance.
- Universal Compatibility: Designed to fit standard MIKUNI carburetor setups, ideal for motorcycles, ATVs, and off-road vehicles.
- Corrosion-Resistant Material: Premium brass construction withstands harsh environments and prolonged use without degradation.
- Easy Adjustability: Standard jet sizing allows for simple tuning to match specific engine requirements.
Why Choose This Product
MIKUNI's Large Round Main Jets deliver reliable fuel delivery for riders demanding peak performance. The precision-engineered design minimizes fuel waste while maintaining consistent air-fuel ratios, enhancing engine efficiency and power output. Whether you're modifying a high-performance engine or optimizing stock setups, these jets provide the accuracy needed for professional-level results. Their durable construction ensures long-term reliability, making them a trusted choice for serious powersports enthusiasts.
| SKU | GM167E5754 |
|---|---|
| MPN | FN100604-65 |
| Brand | MIKUNI |
| Category | Jets |
0.0
0 reviews
0
Log in to write a review.
Reviews
No reviews yet. Be the first to review this product!
Featured Review
| Make | Model | Years |
|---|---|---|
| Various Yamaha | XT/TT/WR Series (e.g., XT250, WR250) | 1980-2025 |
| Various Honda | CR/XR Series (e.g., XR250R, CRF230) | 1970-2025 |
| Various Kawasaki | KX/KLX Series (e.g., KLX300) | 1980-2025 |
| Various Suzuki | DR-Z/DR Series (e.g., DR-Z400) | 1975-2025 |
| Various ATV/UTV | Honda TRX/Yamaha YFM Series | 1990-2025 |
Frequently Asked Questions
Fits Mikuni VM26-VM44 series large round main jets, common on Yamaha/Honda/Kawasaki/Suzuki dirt bikes and ATVs.
Use plug chop method: rich = smaller jet, lean = larger. #65 is mid-range for many 250-450cc engines at sea level.
Yes, OEM Mikuni part number FN100604-65, not aftermarket copy.
Yes, smaller jets like #65 for higher altitudes; consult jetting charts for your setup.
No, main jet typically doesn't need o-ring; emulsion tube does - check your carb kit.
Installation Guide
Difficulty
Easy
Est. Time
10 min
Tools Required
- Small flathead screwdriver
- Jet wrench or needle nose pliers
- Carb cleaner
Pro Tips
- Remove carburetor fully for best access
- Use carb cleaner spray to clear jets before install
- Test plug chop method to verify jetting after install
Common Mistakes to Avoid
- Not cleaning carb passages before install
- Damaging o-ring on emulsion tube
- Incorrect jet size selection without testing
Comparison vs Stock/OEM
Direct OEM replacement or upgrade for stock Mikuni carbs; identical to factory jets
Improvements
- Precision machined for consistent flow
- Pure brass construction resists corrosion
Considerations
- None - matches OEM specs exactly
Durability & Warranty
Expected Lifespan
Indefinite with proper cleaning (carb lifespan)
Warranty
Mikuni lifetime against defects
Maintenance
Clean with carb cleaner every 10-20 hours; inspect for clogging
What Others Are Saying
Reviews from across the web
