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Start ShoppingMIKUNI FVM28/58 Throttle Valve Spring - High-Tensile Steel for Carburetor Intake Systems
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Description
Upgrade your motorcycle's carburetor system with this premium MIKUNI throttle valve spring. Engineered for 28mm FVM flat-slide carburetors, this critical component ensures precise fuel-air mixture control and responsive throttle action for power sports enthusiasts.
Key Features
- High-Tensile Steel Construction: Durable, corrosion-resistant material withstands extreme engine conditions for long-lasting performance.
- Perfect Fit for 28mm FVM Carburetors: Precision-engineered dimensions ensure seamless compatibility with Mikuni flat-slide carburetor systems.
- Lightweight Design: Only 0.5 oz (14g) reduces moving mass for faster throttle reaction times and improved engine responsiveness.
Why Choose This Product
Whether you're tuning a high-performance motorcycle or maintaining a classic ride, this throttle valve spring delivers reliable performance. Its spring rate optimizes fuel delivery across RPM ranges, while the lightweight construction enhances throttle sensitivity. Ideal for riders seeking precise control and consistent power delivery without compromising system integrity.
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Upgrade your motorcycle's carburetor system with this premium MIKUNI throttle valve spring. Engineered for 28mm FVM flat-slide carburetors, this critical component ensures precise fuel-air mixture control and responsive throttle action for power sports enthusiasts.
Key Features
- High-Tensile Steel Construction: Durable, corrosion-resistant material withstands extreme engine conditions for long-lasting performance.
- Perfect Fit for 28mm FVM Carburetors: Precision-engineered dimensions ensure seamless compatibility with Mikuni flat-slide carburetor systems.
- Lightweight Design: Only 0.5 oz (14g) reduces moving mass for faster throttle reaction times and improved engine responsiveness.
Why Choose This Product
Whether you're tuning a high-performance motorcycle or maintaining a classic ride, this throttle valve spring delivers reliable performance. Its spring rate optimizes fuel delivery across RPM ranges, while the lightweight construction enhances throttle sensitivity. Ideal for riders seeking precise control and consistent power delivery without compromising system integrity.| SKU | GM91DCE8A9 |
|---|---|
| MPN | FVM28/58 |
| Brand | MIKUNI |
| Category | Intake/Carb/Fuel System |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Suzuki | RM250, RMZ250, RMX250 | 1985-2005 |
| Kawasaki | KX250, KX125 | 1990-2010 |
| Yamaha | YZ250, YZ125 | 1980-2000 |
| Honda | CR250R, CRF250R | 1995-2015 |
Frequently Asked Questions
No, this is specifically for FVM28/58 flat-slide carburetors, not round-slide VM series.
Yes, this is an OEM Mikuni replacement spring, part number FVM28/58.
Typically no, as it's a direct replacement spring with identical tension specs.
This is the genuine OEM replacement; identical specs and performance to factory original.
Installation Guide
Difficulty
Easy
Est. Time
10 min
Tools Required
- Small flathead screwdriver
- Needle-nose pliers
- Carburetor cleaner
Pro Tips
- Compress spring gently with pliers to avoid bending
- Clean throttle valve bore before reinstalling
Common Mistakes to Avoid
- Forgetting to remove old spring completely
- Damaging throttle valve during disassembly
Comparison vs Stock/OEM
Direct OEM replacement part from Mikuni
Improvements
- Identical to factory specifications
- Restores original throttle response
Considerations
- None - exact factory replacement
Durability & Warranty
Expected Lifespan
5+ years typical with proper maintenance
Warranty
Mikuni 1-year manufacturer warranty
Maintenance
Inspect during annual carb cleaning; replace if fatigued or corroded
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