One reed petal is NOT enough!
Boyesen's revolutionary dual-stage reed design delivers more usable power than stock. Stock single-stage reeds operate most effectively within a relatively narrow RPM range and are limited because of the single stage design. 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. The dual-stage design allows you to replace your stock reed stop with a Rev-Plate which permits the reeds to open freely and function efficiently.
"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.
The Benefits:
Quicker acceleration for that all-important holeshotCrisper throttle response for fast corner exits and surer jumpsMore horsepower throughout the powerband for guaranteed performanceImproved engine efficiency and fuel economy for the long distance riderLonger life - Boyesen Power Reeds outlast all other aftermarket reeds"""
Fitment:
YAMAHA
YZ85 02-25
