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Start ShoppingMikuni FN100604-167.5 Large Round Main Jet - Precision Fuel Control for Carburetors
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Description
Upgrade your Mikuni carburetor's fuel delivery system with this precision-engineered main jet. Designed for seamless integration, this 167.5-size round jet ensures optimal air-fuel ratios across all throttle ranges, enhancing engine performance and responsiveness.
Key Features
- Jet Type & Size: Large round main jet with 167.5 calibration for precise fuel flow control
- Material: Durable brass construction resists corrosion and maintains dimensional stability
- Design: Rounded shape promotes even fuel atomization and efficient combustion
Why Choose This Product
This Mikuni main jet is engineered to deliver consistent fuel delivery under varying operating conditions. The brass material ensures long-term reliability, while the large round design optimizes fuel-air mixing for smoother throttle response. Perfect for riders seeking precise control over their engine's performance without compromising durability.
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Upgrade your Mikuni carburetor's fuel delivery system with this precision-engineered main jet. Designed for seamless integration, this 167.5-size round jet ensures optimal air-fuel ratios across all throttle ranges, enhancing engine performance and responsiveness.
Key Features
- Jet Type & Size: Large round main jet with 167.5 calibration for precise fuel flow control
- Material: Durable brass construction resists corrosion and maintains dimensional stability
- Design: Rounded shape promotes even fuel atomization and efficient combustion
Why Choose This Product
This Mikuni main jet is engineered to deliver consistent fuel delivery under varying operating conditions. The brass material ensures long-term reliability, while the large round design optimizes fuel-air mixing for smoother throttle response. Perfect for riders seeking precise control over their engine's performance without compromising durability.
| SKU | GM6A66DC2C |
|---|---|
| MPN | FN100604-167.5 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various Japanese | Models with Mikuni VM/PF series carbs (e.g., Yamaha YZ, Suzuki RM, Honda CR, Kawasaki KX) | 1980-2025 |
| Honda | XR series (XR250R, XR400R, XR650R) | 1990-2010 |
Frequently Asked Questions
The main jet controls fuel flow through the carburetor at mid-range to full throttle. A larger number (like 167.5) means more fuel flow, while smaller numbers mean less fuel.
Jet selection depends on altitude, temperature, engine modifications, and your carburetor model. Start with the manufacturer's recommendation and adjust based on plug color and performance.
No. Different Mikuni carburetors (VM, TMX, TM, etc.) have different jet sizes and specifications. Verify your carburetor model before purchasing.
Jets rarely wear out. Replace only if damaged, clogged, or when changing jetting for performance tuning or altitude changes.
The main jet controls fuel at mid to full throttle, while the pilot jet controls fuel at idle and low throttle. Both are needed for proper carburetor function.
Installation Guide
Difficulty
Easy
Est. Time
15 min
Tools Required
- Small screwdriver or jet removal tool
- Clean workspace
- Carburetor cleaning supplies (optional)
Pro Tips
- Keep jets organized by size if testing multiple options
- Take photos during disassembly for reference
- Clean carburetor passages while you have it apart
- Test ride after installation to verify jetting is correct
Common Mistakes to Avoid
- Over-tightening jet (can damage brass)
- Installing wrong jet size for your jetting needs
- Not cleaning carburetor before reassembly
- Forgetting to drain fuel before disassembly
Durability & Warranty
Expected Lifespan
Indefinite if not damaged; jets don't wear out under normal use
Warranty
Typically covered under Mikuni's standard warranty
Maintenance
No maintenance required; replace only if damaged or clogged
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