Bel-Ray Thumper Racing Synthetic Ester Blend 4T Engine Oil combines the finest quality synthetic esters and mineral base oils specifically engineered for today’s 4-stroke single cylinder, multi-valve racing engines. The oil provides maximum anti-wear protection for valve-trains, rings, cylinders and pistons. It delivers maximum horsepower while providing consistent clutch performance. Bel-Ray Thumper Racing Synthetic Ester Blend 4T Engine Oil exceeds API SM and JASO MA2 requirements. The oil is suitable for air-cooled or liquid-cooled 4-stroke engines and wet clutches.
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General Description: Bel-Ray Thumper Racing Synthetic Ester Blend 4T Engine Oil is a premium multi-grade synthetic blend motor oil engineered for single cylinder multi-valve 4-stroke racing engines. Bel-Ray Thumper Racing Synthetic Ester Blend 4T Engine Oil protects against viscosity breakdown under high temperature and high shear. Product No. 99520 99530 SAE Grade 10W-40 15W-50 API Service Category SM SM JASO Performance Classification MA2 MA2