Laboratory flow analysis proves Boyesen double-action reeds out-perform standard reeds by permitting greater flow velocity over the entire range of operating pressures. That translates into increased performance from start-up to top acceleration. No other device, including other replacement reeds, can give a stock machine a bigger power boost. Top racers and knowledgeable riders make Boyesen Reeds their first step in getting more power and performance from their machines.
All kits come complete to do one engine.
Note: See application chart for applicable footnote
