For 1984-to-present V-Twin American motorcycle engines, including Evolution, Twin Cam, and aftermarket engines of similar designSame fluid as our famous MTL gear oilImproves clutch operation while reducing wear and temperatureWhere most synthetics are too slippery for clutch operation, this friction-balanced product is balanced to provide less slip, smoother operation, and helps to apply more power in modified enginesThis product is for use in the primary chaincase with wet-diaphragm spring clutches.