Laboratory flow analysis proves Boyesen® dual-stage reeds out-perform standard reeds.
They permit greater flow velocity over the entire range of operating pressures.
Increased performance from start-up to top acceleration.

Features:
Dual stage reeds
Minor change gives major H.P. improvements
Faster opening and closing
Greater low pressure (Low-throttle) response
Greater velocity and flow area
Longer overall life
No engine damage if broken