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Start ShoppingMIKUNI FN100604-75 Large Round Main Jets - Precision Fuel Delivery for Carburetors
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Description
Upgrade your carburetor's fuel delivery system with MIKUNI's Large Round Main Jets. These precision-engineered components ensure optimal fuel-air mixture for enhanced engine performance and reliability.
Key Features
- High-Flow Design: Optimized fuel flow rates for powerful, responsive engine performance.
- Durable Construction: Precision-machined brass for long-lasting durability in harsh environments.
- Easy Installation: Standardized sizing for seamless integration with existing carburetor systems.
- Adjustable Settings: Fine-tune fuel delivery for specific riding conditions and engine modifications.
- Compatibility: Designed for MIKUNI carburetors to ensure proper system balance and efficiency.
Why Choose This Product
These main jets deliver consistent fuel delivery for improved throttle response, smoother power delivery, and better fuel efficiency. The robust brass construction resists corrosion and wear, while the adjustable flow settings allow riders to customize performance for racing, off-road, or street use. Perfect for mechanics and enthusiasts seeking precise control over their engine's fuel system.
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Upgrade your carburetor's fuel delivery system with MIKUNI's Large Round Main Jets. These precision-engineered components ensure optimal fuel-air mixture for enhanced engine performance and reliability.
Key Features
- High-Flow Design: Optimized fuel flow rates for powerful, responsive engine performance.
- Durable Construction: Precision-machined brass for long-lasting durability in harsh environments.
- Easy Installation: Standardized sizing for seamless integration with existing carburetor systems.
- Adjustable Settings: Fine-tune fuel delivery for specific riding conditions and engine modifications.
- Compatibility: Designed for MIKUNI carburetors to ensure proper system balance and efficiency.
Why Choose This Product
These main jets deliver consistent fuel delivery for improved throttle response, smoother power delivery, and better fuel efficiency. The robust brass construction resists corrosion and wear, while the adjustable flow settings allow riders to customize performance for racing, off-road, or street use. Perfect for mechanics and enthusiasts seeking precise control over their engine's fuel system.
| SKU | GME4BCBDB9 |
|---|---|
| MPN | FN100604-75 |
| Brand | MIKUNI |
| Category | Jets |
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Frequently Asked Questions
The main jet controls fuel flow at mid-range to full throttle operation. It's critical for proper engine performance, fuel economy, and preventing lean-running conditions that can damage the engine.
Signs you may need jetting changes include: poor throttle response, black smoke (too rich), white smoke/pinging (too lean), or performance changes after altitude/temperature shifts. Consult your carburetor manual or service guide for your specific application.
The FN100604-75 is a Mikuni jet designed for Mikuni carburetors. You must verify your carburetor model matches Mikuni specifications. Check your owner's manual or carburetor documentation.
Yes, jet replacement is straightforward for most riders. You'll need to remove the carburetor, drain fuel, disassemble the float bowl, and swap the jet. Refer to your service manual for specific procedures.
Yes. Performance modifications (air filters, exhaust, engine work) typically require rejetting to maintain proper fuel-air mixture. Consult tuning guides specific to your modifications.
Installation Guide
Difficulty
Easy
Est. Time
15 min
Tools Required
- Carburetor removal tools (varies by application)
- Small screwdrivers
- Carburetor cleaning supplies
- Gasket scraper
Pro Tips
- Always clean the carburetor thoroughly before installing new jets
- Keep jets organized by size to avoid confusion
- Take photos during disassembly for reference
- Replace all gaskets and seals while carburetor is apart
- Test ride and adjust if needed - jetting affects performance significantly
Common Mistakes to Avoid
- Installing jet upside down
- Not cleaning carburetor passages before installation
- Overtightening jet (can damage brass)
- Mixing up main jet with pilot jet
- Not replacing carburetor gaskets during service
Durability & Warranty
Expected Lifespan
Indefinite if not damaged. Brass jets don't wear out but can become clogged or damaged.
Warranty
Typically covered under manufacturer warranty if defective
Maintenance
No maintenance required. Replace only if damaged or when rejetting for modifications.
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