Description
Single-cylinder offroad engines demand an oil engineered specifically for their unique demands—and Bel-Ray Thumper Synthetic delivers exactly that. This synthetic ester formula maintains viscosity stability across extreme temperature swings while protecting valve trains, rings, and cylinder walls from wear, so your engine stays reliable mile after mile. Whether you’re pushing a dirt bike or ATV hard, consistent clutch performance and maximum horsepower preservation are non-negotiable.
- Synthetic ester formula
- 10W-50 viscosity
- 1 liter capacity
- Single-cylinder optimized
- Offroad motorcycle/ATV
- Valve-train protection
- Ring & cylinder wear protection
- Consistent clutch performance
- Maximum horsepower retention
- Temperature stable
- MPN: 99550-B1LW
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