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Start ShoppingMIKUNI FVM28/163-2.0 Needle Valve Round Pump - Precision Fuel Delivery for Carbureted Engines
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Description
Upgrade your carburetor's fuel delivery system with MIKUNI's precision-engineered FVM28/163-2.0 Needle Valve Round Pump. This critical component ensures optimal fuel metering for responsive engine performance and consistent power delivery.
Key Features
- Exact Fitment: Designed for MIKUNI carburetors with 163mm bore size, ensuring seamless integration with existing systems.
- High-Durability Construction: Made from corrosion-resistant materials to withstand harsh riding conditions and prolonged use.
- Smooth Fuel Flow: Precision-machined valve mechanism reduces fuel line resistance for efficient fuel delivery.
Why Choose This Product
Whether you're maintaining a classic motorcycle or modifying a high-performance ATV, this needle valve pump delivers reliable fuel regulation. Its compact design minimizes system backpressure while maintaining precise fuel metering, helping riders achieve better throttle response and fuel efficiency. The round pump housing also simplifies installation and maintenance, making it a trusted choice for mechanics and riders alike.
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Upgrade your carburetor's fuel delivery system with MIKUNI's precision-engineered FVM28/163-2.0 Needle Valve Round Pump. This critical component ensures optimal fuel metering for responsive engine performance and consistent power delivery.
Key Features
- Exact Fitment: Designed for MIKUNI carburetors with 163mm bore size, ensuring seamless integration with existing systems.
- High-Durability Construction: Made from corrosion-resistant materials to withstand harsh riding conditions and prolonged use.
- Smooth Fuel Flow: Precision-machined valve mechanism reduces fuel line resistance for efficient fuel delivery.
Why Choose This Product
Whether you're maintaining a classic motorcycle or modifying a high-performance ATV, this needle valve pump delivers reliable fuel regulation. Its compact design minimizes system backpressure while maintaining precise fuel metering, helping riders achieve better throttle response and fuel efficiency. The round pump housing also simplifies installation and maintenance, making it a trusted choice for mechanics and riders alike.
| SKU | GM10500FAF |
|---|---|
| MPN | FVM28/163-2.0 |
| Brand | MIKUNI |
| Category | Intake/Carb/Fuel System |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various Japanese | VM28 carbureted motorcycles (e.g., Yamaha XS650, Suzuki GS series, Kawasaki KZ series) | 1980-2005 |
| Honda | CB/CL series with VM28 carbs | 1975-1990 |
Frequently Asked Questions
Yes, this is the direct OEM replacement needle valve and round pump assembly for Mikuni VM28/163 carburetors.
Round pump valves are for earlier VM carbs (pre-1980s); flat slide pumps are for later models. Check your carb markings.
No, this is needle valve and pump only. Floats are sold separately (e.g., Mikuni 4-730 float).
Yes, Viton tip and diaphragm are E10 compatible; for E85, consider upgrading to larger flow rate.
Installation Guide
Difficulty
Easy
Est. Time
15 min
Tools Required
- Small flathead screwdriver
- Needle nose pliers
- Carb cleaner
Pro Tips
- Remove carb bowl first, inspect float height after install, use carb cleaner to lubricate o-rings
Common Mistakes to Avoid
- Damaging the Viton tip during installation
- Not seating the pump diaphragm properly
Comparison vs Stock/OEM
This is the genuine Mikuni OEM part, not aftermarket
Improvements
- Precise fuel metering vs. worn stock
- Corrosion-resistant Viton materials
- Restores factory float height and flow
Considerations
- None - direct OEM replacement
Durability & Warranty
Expected Lifespan
10+ years with proper maintenance
Warranty
Limited lifetime from Mikuni (defect only)
Maintenance
Inspect annually; clean with carb solvent, avoid ethanol over 10% long-term
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