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Start ShoppingMIKUNI F42-10 HSR 45/42 Carburetor Easy Kit - Intake/Carb/Fuel System Upgrade
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Description
Elevate your powersports performance with MIKUNI's F42-10 HSR 45/42 Carburetor Easy Kit. This premium upgrade delivers precise fuel delivery, enhanced throttle response, and seamless integration with your stock components for maximum power without compromising your bike's original look.
Key Features
- Aluminum Body with Brass Jets: Durable construction ensures long-lasting performance while allowing precise fuel metering for optimal engine efficiency.
- 45mm Intake / 42mm Venturi Design: Optimized airflow dynamics for improved horsepower and throttle control across all RPM ranges.
- Adjustable Accelerator Pump: Fine-tune fuel delivery for responsive acceleration and smooth power delivery.
- Power Jet System: Advanced fuel metering technology for consistent performance in varying weather and altitude conditions.
- Easy Tuning Kit Included: Complete jets, needles, and gaskets for hassle-free setup and customization.
- California A.R.B. Legal Compatibility: Special adapter supports Screamin' Eagle performance air filters while meeting emissions regulations for EVO Big Twin applications.
Why Choose This Product
Upgrade to a high-performance carburetor system that maintains your bike's factory appearance while delivering measurable gains in power and responsiveness. The stock manifold and cable compatibility simplify installation, while the included tuning components let you customize performance to match your riding style. Whether you're chasing track times or weekend adventures, this MIKUNI kit offers a reliable, legal, and easy-to-install solution for serious riders.
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Elevate your powersports performance with MIKUNI's F42-10 HSR 45/42 Carburetor Easy Kit. This premium upgrade delivers precise fuel delivery, enhanced throttle response, and seamless integration with your stock components for maximum power without compromising your bike's original look.
Key Features
- Aluminum Body with Brass Jets: Durable construction ensures long-lasting performance while allowing precise fuel metering for optimal engine efficiency.
- 45mm Intake / 42mm Venturi Design: Optimized airflow dynamics for improved horsepower and throttle control across all RPM ranges.
- Adjustable Accelerator Pump: Fine-tune fuel delivery for responsive acceleration and smooth power delivery.
- Power Jet System: Advanced fuel metering technology for consistent performance in varying weather and altitude conditions.
- Easy Tuning Kit Included: Complete jets, needles, and gaskets for hassle-free setup and customization.
- California A.R.B. Legal Compatibility: Special adapter supports Screamin' Eagle performance air filters while meeting emissions regulations for EVO Big Twin applications.
Why Choose This Product
Upgrade to a high-performance carburetor system that maintains your bike's factory appearance while delivering measurable gains in power and responsiveness. The stock manifold and cable compatibility simplify installation, while the included tuning components let you customize performance to match your riding style. Whether you're chasing track times or weekend adventures, this MIKUNI kit offers a reliable, legal, and easy-to-install solution for serious riders.| SKU | GM76580E70 |
|---|---|
| MPN | F42-10 |
| Brand | MIKUNI |
| Category | Intake/Carb/Fuel System |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Honda | CRF450R | 2009-2024 |
| Honda | CRF450RX | 2013-2024 |
| KTM | 450 SX-F | 2008-2024 |
| KTM | 450 EXC-F | 2008-2024 |
| Yamaha | YZ450F | 2010-2024 |
| Suzuki | RMZ450 | 2006-2024 |
Frequently Asked Questions
Yes, the Easy Kit includes carburetor, jets, needles, gaskets, air filter adapter, and tuning instructions.
Yes, for listed models. Requires removing stock throttle body and using provided manifold adapter.
Use smaller main jets for higher altitudes. Kit includes multiple jets. Consult Mikuni tuning chart.
Carburetors may not pass emissions in some states. Check local regulations.
HSR45/42 has 45mm throttle bore with 42mm venturi for better mid-range throttle response.
Installation Guide
Difficulty
Medium
Est. Time
1 hr 30 min
Tools Required
- socket set (8-14mm)
- torque wrench
- screwdrivers
- carb cleaner
- vacuum gauge
Pro Tips
- Use the included tuning manual
- Start with stock jetting and adjust based on plug reads
- Apply thread locker to idle mixture screw
Common Mistakes to Avoid
- Incorrect jetting for altitude/temp
- Not syncing throttle valves
- Overlooking intake manifold gasket
Comparison vs Stock/OEM
Replaces EFI throttle body with flat-slide carburetor for superior throttle response
Improvements
- Faster throttle response
- Better power delivery across RPM
- Easier tuning for mods
- Improved throttle feel
Considerations
- Requires carb tuning knowledge
- Cold starts may need choke adjustment
Durability & Warranty
Expected Lifespan
5+ years with proper maintenance
Warranty
Limited lifetime on carb body, 1 year on components (Mikuni)
Maintenance
Clean every 20 hours racing, check float height seasonally, rebuild every 100 hours hard use
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