Bel Ray Thumper Racing Synthetic Ester Blend 4-stroke racing oil combined with the highest quality synthetic ester and highly refined mineral base oils developed specifically for today's 4-stroke single-cylinder multi-valve engines. It provides maximum wear protection for valves, cylinders and pistons. Ensures maximum performance with constant clutch performance. Meets API SN and JASO MA2 requirements. Suitable for air-cooled as well as water-cooled 4-stroke engines and wet couplings. The shear stability ensures superior lubrication and film resistance. Smooth transmission of force Prevents clutch grippers for easy-to-control and efficient shift and clutch operation.

• Viscosity: 10W50
• Racing engine oil
• For all air-cooled and water-cooled 4-stroke engines
• Meets or surpasses JASO MA / MA1 / MA2
• Minimizes friction for maximum performance
• shear stability
• For wet couplings
• Contents: 4 liter