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Start ShoppingBOYESEN 691 M/C Reed - High-Performance Intake System for Enhanced Power & Efficiency
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Description
Upgrade your motorcycle's intake system with BOYESEN's high-performance M/C Reed, engineered to deliver maximum airflow and power output while maintaining fuel efficiency. This essential component enhances engine breathing for a smoother, more responsive ride.
Key Features
- Advanced Airflow Optimization: Precision-engineered design ensures optimal air-fuel mixture for improved horsepower and throttle response.
- Durable, Lightweight Construction: High-grade materials withstand extreme temperatures and vibrations for long-lasting performance.
- Easy Installation: Plug-and-play design fits standard motorcycle intake systems with minimal modifications.
- Compatibility: Specifically designed for BOYESEN 691 models to ensure perfect fit and function.
Why Choose This Product
Whether you're a street rider or off-road enthusiast, this reed delivers reliable performance that enhances engine efficiency without compromising durability. Its lightweight construction reduces strain on the engine while maintaining peak airflow, resulting in better fuel economy and a more powerful ride. The straightforward installation process makes it an ideal upgrade for mechanics and DIY enthusiasts looking to boost their motorcycle's performance.
SKU:
GM4334AF3F
MPN:
691
UPC:
804429003990
Category:
Intake/Carb/Fuel System
Brand:
BOYESEN
Stock:
In Stock
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Upgrade your motorcycle's intake system with BOYESEN's high-performance M/C Reed, engineered to deliver maximum airflow and power output while maintaining fuel efficiency. This essential component enhances engine breathing for a smoother, more responsive ride.
Key Features
- Advanced Airflow Optimization: Precision-engineered design ensures optimal air-fuel mixture for improved horsepower and throttle response.
- Durable, Lightweight Construction: High-grade materials withstand extreme temperatures and vibrations for long-lasting performance.
- Easy Installation: Plug-and-play design fits standard motorcycle intake systems with minimal modifications.
- Compatibility: Specifically designed for BOYESEN 691 models to ensure perfect fit and function.
Why Choose This Product
Whether you're a street rider or off-road enthusiast, this reed delivers reliable performance that enhances engine efficiency without compromising durability. Its lightweight construction reduces strain on the engine while maintaining peak airflow, resulting in better fuel economy and a more powerful ride. The straightforward installation process makes it an ideal upgrade for mechanics and DIY enthusiasts looking to boost their motorcycle's performance.| SKU | GM4334AF3F |
|---|---|
| MPN | 691 |
| UPC/GTIN | 804429003990 |
| Brand | BOYESEN |
| Category | Intake/Carb/Fuel System |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Kawasaki | KX450F | 2004-2009 |
| Kawasaki | KX250F | 2006-2009 |
| Suzuki | RM250 | 2003-2007 |
| Yamaha | YFS200 Blaster | 2001-2008 |
| Yamaha | PW80 / BW80 | 1987-2006 |
| KTM | 65SX / 85SX | 2005-2020 |
Frequently Asked Questions
Yes, the Boyesen 691 is directly compatible with 2004-2009 Kawasaki KX450F models.
Typically 5-10% improvement in low to mid-range throttle response due to quicker reed action.
Petals last 20-50 hours depending on riding style; longer than stock in most cases.
Yes, no modifications required for listed fitments.
691 has slightly thicker petals for higher RPM durability; 690 is for lower RPM focus.
Installation Guide
Difficulty
Easy
Est. Time
20 min
Tools Required
- Socket set (8-10mm)
- Torx bits (T25-T30)
- Torque wrench
Pro Tips
- Clean all old gasket material thoroughly
- Torque screws to 5-7 in-lbs in crisscross pattern
- Check reed petal gap after install
Common Mistakes to Avoid
- Not cleaning mating surfaces
- Over-torquing reed cage screws
Comparison vs Stock/OEM
Boyesen 691 uses fiberglass-reinforced nylon petals vs stock carbon fiber or brass; provides faster opening and closing for better low-end torque
Improvements
- Quicker throttle response
- Reduced reed flutter at high RPM
- Longer petal life in abusive conditions
Considerations
- Slightly higher cost
- May require re-jet if heavily modifying carb
Durability & Warranty
Expected Lifespan
Petals: 20-50 hours racing, 100+ hours trail; Cage: lifetime
Warranty
2 year manufacturer defect warranty
Maintenance
Inspect petals every 10 hours; replace when edges fray or crack
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