Bel-Ray Thumper 4-Stroke Racing Motor Oil is specifically engineered to meet the demands of single cylinder multi-valve 4-stroke racing engines. The high temperatures and severe loads of racing require the exceptional film strength, shear- and temperature stability of Bel-Ray Thumper 4-Stroke Racing Motor Oil.

Applications

• For use in either engine or combined engine/gearbox systems
• Recommended for single cylinder multi-valve 4-stroke racing engines
• Equally suitable for air-cooled and liquid-cooled engines

Features and Benefits

• High viscosity stability High Viscosity Index and shear stability of the synthetic components provide superior lubrication and film strength
• Superior lubricity High Viscosity Index oil provides superior lubricity for reduced friction loss resulting in maximum engine power
• Superior anti-wear Exclusive Bel-Ray anti-wear additive chemistries form a very low friction coating on all lubricated parts for best wear protection of valve-train and gears subjected to constant shock loads and boundary lubrication
• Superior shear- and temperature stability Oil flows freely when cold and maintains exceptional film strength at high temperature for improved ring sealing and compression.
• Superior deposit control Unique anti-oxidants, dispersants and thermal stabilizers prevent and solubilize existing sludge and deposits for better engine cooling.