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Bel-Ray Thumper Racing Synthetic Ester Blend 4T Engine Oil

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Bel Ray Thumper Racing Synthetic Ester Blend 4T Motor Oil

Bel Ray Thumper Racing Synthetic Ester Blend 4T Motor Oil is a 4-stroke motorcycle racing oil that combines the finest quality synthetic esters and highly-refined mineral base oils specifically engineered 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 providing consistent clutch performance. Suitable for air-cooled/liquid-cooled 4-stroke engines and wet clutches.


  • Reduced cylinder and ring wear
  • Superior deposit control
  • Shear stabilizer provides superior lubrication and film strength
  • Prevents clutch grabbing for easily controlled and efficient gear shifting and clutch operation
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Product Style Item # Store SKU Manufacturer Product # Availability
Product Style 10W40 / 1 Liter Item # 166781 Store SKU 190589 Manufacturer Product # 99520-B1LW Availability In Stock: Ships within 24 hours
Product Style 10W40 / 4 Liter Item # 166782 Store SKU Manufacturer Product # 99520-B4LW / 96262-BT4LN Availability Out of Stock
Product Style 15W50 / 4 Liter Item # 775958 Store SKU Manufacturer Product # 99530-B4LW Availability In Stock: Ships within 24 hours
Product Style 15W50 / 1 Liter Item # 775967 Store SKU 4555 Manufacturer Product # 99530-B1LW Availability In Stock: Ships within 24 hours
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