- Boyesen's? patented dual-stage design incorporates a specially shaped top reed and a ported bottom reed
- The top reed is lightweight and resilient for crisp throttle response at partial throttle or low RPMs
- The stiffer, bottom reed is ported to provide maximum flow and horsepower at higher RPMs
- Allows replacement of stock reed stop with a Rev-Plate which permits the reeds to open freely and function efficiently
Polini -- Mini Supermotard -- (2004); Polini -- X1 P Minicross -- (2004); Polini -- GR 3 Reverse Minimoto -- (2004)
