Performance engineered primary motor sprocket replaces OEM Compensator on Milwaukee 8® modelsProvides instant torque response combined with an ''engine pulse absorbing cushion drive'' primary drive systemEngineered for longevity compared to OEM compensating sprockets without sacrificing rider comfortPatented system puts an emphasis on rider comfort compared to the noise and harsh feeling under loads associated with one piece solid motor sprocketsPremium features includes the ability to rebuild and service the unit in place versus expensive compensators that need to be replaced as an entire unitMade in the USADue to ''Factory starting phase assignment'' you may experience starting issues combining the Man O-War Motorsprocket with ''easy start cams'' The ECM looks for crankshaft ''deceleration'' to determine phase for F & R cylinder timing assignments. Please be aware that we do not recommend using both of these products together as it may very well lead to starting issues.