PJ1 Clutch Tuner 2-Stroke Gear Oils SAE 80W is designed for today's high performance 2 stroke motorcycle clutches and transmissions. Formulated with high base stocks and very shear stable VI improvers. PJ1 Clutch Tuner Oils will maintain viscometric properties throughout their useful life and will not experience rapid viscosity loss through shear. 80W provides ultra-low fluid drag for increased performance in smaller displacement engines while providing ultimate clutch performance. 80W is yellow metal safe due to advanced additive technology.