Upgrade your motorcycle’s intake performance with Boyesen 624 Dual-Stage Motorcycle Reeds. Designed for improved throttle response and stronger overall engine performance, these replacement reed petals use a dual-stage design to help optimize airflow across a broader range of engine speeds. The Boyesen 624 reed assembly is engineered for faster opening and closing, helping deliver improved low-pressure response during low-throttle operation.
Feature: Dual-stage reed design helps improve airflow control and engine response.
Feature: Faster opening and closing supports sharper throttle operation.
Feature: Increased velocity and flow area can contribute to improved horsepower and stronger intake performance.
Feature: Improved low-throttle response enhances rideability in technical and controlled riding conditions.
Feature: Durable construction provides longer overall service life.
Feature: Designed to avoid engine damage if a reed breaks.
These Boyesen motorcycle reeds are manufactured for direct fitment on select Yamaha two-stroke applications, including the 1992 and 1993 Yamaha WR500, as well as Yamaha YZ490 models from 1984 through 1990. The Boyesen 624 also fits the 1984 Yamaha YZ250. Verify the exact year, model, and existing reed assembly before installation to ensure proper fitment. Manufacturer part number and vendor part number: Boyesen 624.
Features:
- Dual-stage reed design helps improve airflow control and engine response.
- Faster opening and closing supports sharper throttle operation.
- Increased velocity and flow area can contribute to improved horsepower and stronger intake performance.
- Improved low-throttle response enhances rideability in technical and controlled riding conditions.
- Durable construction provides longer overall service life.
- Designed to avoid engine damage if a reed breaks.
Fitment:
1984 Yamaha YZ250
1984 Yamaha YZ490
1985 Yamaha YZ250
1985 Yamaha YZ490
1986 Yamaha YZ250
1986 Yamaha YZ490
1987 Yamaha YZ250
1987 Yamaha YZ490
1988 Yamaha YZ250
1988 Yamaha YZ490
1989 Yamaha YZ490
1990 Yamaha YZ490
1992 Yamaha WR500
1993 Yamaha WR500