For: Fantic 249 all models; Fantic 309 all models; Honda CR80 1987-2002; Honda CR80 Expert 1996-2002; Honda CR85 and CR85 Expert 2003-2008; Suzuki RM80 1989-2001;Power reeds use a patented dual stage fiberglass design for more air flow, more air velocity and more power;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;Longer overall life: Boyesen power reeds outlast all other aftermarket reed petals;Minor change gives major horsepower improvements and fuel economy

• Boyesen 631 Power Reed
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Boyesen 631 Power ReedBoyesen