Boyesen 605 Power Reed For: Honda CR80 1986; Kawasaki KDX80 all models, KE175 all models, KX80 through 1985; Yamaha DT100 1978, DT125 through 1987, DT175 all models, MX100 all models, MX175 all models For: RT100 through 1989, RT180 all models, Tri-Moto 125 1983-1987, YZ125 1974, YZ60 all models, YZ80 1975-1979 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 Power reeds use a patented dual stage fiberglass design for more air flow, more air velocity and more power; minor change gives major horsepower improvements and fuel economy