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Bel-Ray Thumper Friction Modified Racing 4T Engine Oil is a 4-stroke motorcycle racing oil formulated specifically for motorcycle applications using separate engines and transmissions. Friction modifiers reduce engine temperature, increase horsepower and extend engine life. Meets API SM and JASO MB requirements. Suitable for air-cooled/liquid-cooled 4-stroke engines. Features and Benefits: -Suitable for air or liquid-cooled 4-stroke engines -Reduced cylinder and ring wear. Longer bearing life -Cleans deposits. Controls sludge and varnish formation. -Keeps ring lands and grooves free of carbon build-up -The shear stability provides superior lubrication and film strength. -Minimizes friction for maximum power -Reduced energy to turn the engine means more power to the rear tire
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