Arctic Cat 650 H-1 4x4 (2005 ONLY, single cyl. only, oversized t

The popular Arctic 650 H-1 4 x 4 is calibrated fairly well for general use with stock tires, but oversized tires have a very negative effect. Many performance enthusiasts are well aware of the fact the even slightly bigger or heavier tires can substantially hurt acceleration and speed performance. The addition of this cost effective weight roller insert kit for the primary drive clutch helps recover some of that lost power. This kit is intended to help with re-calibration for oversized tires. If installed on a unit with stock tires, it does show some gain in acceleration but slight loss of top speed. It also aids in restoration of power lost at higher altitudes.