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Start ShoppingMIKUNI FHS42/001-K Air Box Adapter Kit - High-Strength Plastic & Aluminum Intake System for TM42 Carburetors
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Description
Upgrade your Mikuni TM42 carburetor's airflow efficiency with this specialized air box adapter kit. Designed for seamless integration and enhanced performance, this adapter ensures optimal fuel-air mixture for smoother engine operation and increased power output.
Key Features
- High-Strength Plastic and Aluminum Construction: Durable materials withstand harsh riding conditions while maintaining structural integrity.
- Precision-Fit Design for TM42 Carburetors: Perfectly sized 4.2 in x 4.2 in flange ensures a snug, leak-free connection.
- Durable and Lightweight Build: 0.5 lbs weight reduces strain on engine components without compromising strength.
- Easy Installation Compatibility: Simplifies maintenance and upgrades with straightforward fitment for Mikuni TM42 systems.
Why Choose This Product
This air box adapter kit delivers reliable performance for off-road and on-road applications. Its corrosion-resistant materials ensure long-term durability, while the optimized airflow design enhances engine efficiency. Riders benefit from improved throttle response and consistent power delivery, making it an essential upgrade for performance-focused Mikuni carburetor setups.
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Upgrade your Mikuni TM42 carburetor's airflow efficiency with this specialized air box adapter kit. Designed for seamless integration and enhanced performance, this adapter ensures optimal fuel-air mixture for smoother engine operation and increased power output.
Key Features
- High-Strength Plastic and Aluminum Construction: Durable materials withstand harsh riding conditions while maintaining structural integrity.
- Precision-Fit Design for TM42 Carburetors: Perfectly sized 4.2 in x 4.2 in flange ensures a snug, leak-free connection.
- Durable and Lightweight Build: 0.5 lbs weight reduces strain on engine components without compromising strength.
- Easy Installation Compatibility: Simplifies maintenance and upgrades with straightforward fitment for Mikuni TM42 systems.
Why Choose This Product
This air box adapter kit delivers reliable performance for off-road and on-road applications. Its corrosion-resistant materials ensure long-term durability, while the optimized airflow design enhances engine efficiency. Riders benefit from improved throttle response and consistent power delivery, making it an essential upgrade for performance-focused Mikuni carburetor setups.
| SKU | GMA4B2296C |
|---|---|
| MPN | FHS42/001-K |
| Brand | MIKUNI |
| Category | Intake/Carb/Fuel System |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Honda | CRF450R | 2017-2024 |
| Honda | CRF450RX | 2017-2024 |
| Honda | CRF450L | 2019-2024 |
Frequently Asked Questions
Yes, designed for stock Honda CRF450 airboxes when converting to Mikuni TM42 carburetor. Verify your model year.
This is just the airbox adapter. You'll need the TM42 carb, intake boots, and jets for full conversion.
Primarily for OEM airboxes. Some aftermarket may require modification.
Enables larger TM42 carb for better throttle response and top-end power.
Installation Guide
Difficulty
Medium
Est. Time
45 min
Tools Required
- Phillips screwdriver
- 8mm socket
- torque wrench
- gasket scraper
Pro Tips
- Apply silicone sealant to edges for perfect seal
- Torque screws to 5-7 Nm
- Test for air leaks with carb cleaner spray after install
Common Mistakes to Avoid
- Not cleaning mating surfaces
- Over-tightening screws leading to cracks
- Forgetting to replace air filter
Comparison vs Stock/OEM
Replaces restrictive stock carb/airbox interface with larger 42mm opening
Improvements
- Supports bigger carb for 10-15% more power
- Better throttle response
- Improved air flow without aftermarket airbox
Considerations
- Requires full carb conversion
- May need re-jet for optimal performance
Durability & Warranty
Expected Lifespan
Lifetime with proper install - no moving parts
Warranty
Limited lifetime from Mikuni
Maintenance
Inspect seals annually, replace gasket if degraded
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