All Categories
Boyesen's revolutionary dual-stage reed design delivers more usable power than stock.
Your original one-stage reed operates most effectively only within a narrow RPM range.
Boyesen's one soft reed on top of one firm flow-through reed gives you a wide range of intake control, plus increased intake velocity.
Your original reeds can't possibly duplicate that performance.
Dual-stage reeds.
Minor change give major HP improvements. Faster opening and closing. Greater low pressure (low-throttle) response. Greater velocity and flow area. Longer overall life. No engine damage if broken. Note: For stock replacement ONLY. Dual-stage reeds work in