THE WASHER THAT HOLDS IT ALL TOGETHER
The OEM dome washer that holds the countershaft sprocket is made of mildly heat treated material. When that component is installed under a tightened counter-shaft bolt, it is taken well beyond it’s “yield” or “elastic” limit and permanently deforms. In that condition in cannot maintain the thrust pressure necessary to keep the sprocket tight to the splined shaft. That leads to two different failures. First, the O-ring is allowed enough clearance that is begins seeping. Secondly, the backlash between the splined shaft and sprocket is allowed to more freely pound in each direction, as the torque of power verses compression reverses itself.
The MSR Countershaft Washer is built using heat-treated tool steel that develops two to three times the pre-load force without reaching its elastic limit and without over-stressing the mating components. This solves O-ring leakage as well as extending the life of both the counter-shaft and sprocket splines. A counter-shaft replacement alone, with labor costs in excess of $700.
> Constructed from heat treated tool steel.
> Stronger than OEM washer to prevent stress on countershaft O-ring.
> Will not start to flatten over time losing valuable thrust pressure on sprocket.
> Made in USA
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