Thumper 10W-40 1 Liter.

Bel-Ray Thumper Racing Synthetic Ester Blend 4T engine oil is a 4-stroke engine racing oil that combines the highest quality synthetic esters with highly refined mineral base oils developed specifically for today's 4-stroke single cylinder, multi-valve racing engines. Provides maximum anti-wear protection for valve trains, rings, cylinders and pistons. Delivers maximum horsepower while delivering consistent clutch performance. Meets API SN and JASO MA2 requirements. Suitable for air-cooled / liquid-cooled 4-stroke engines and wet clutches.

Quality: semi-synthetic 

Synthetic based racing engine blend
Maximum power and consistent clutch performance
Wear protection for valve trains, rings, cylinders and pistons
For air-cooled / liquid-cooled 4 stroke engines with wet clutches