Choosing an oil specifically labeled for wet clutch use ensures the additive package is balanced for the entire drivetrain. Viscosity and Performance Considerations While viscosity requirements can sometimes overlap, the operational environment of a motorcycle engine is often more extreme.
Understanding Viscosity and Friction Properties for Safe Use
Car oil is engineered to maintain stability under the more consistent conditions of highway cruising. This leads to a condition known as clutch slippage, where the engine revs increase without a corresponding rise in speed.
Standard car gear oils are not formulated to handle these specific stresses, making them unsuitable for the enclosed gearbox environment. If the oil has the wrong viscosity or, more importantly, the wrong friction properties, the clutch plates cannot bind together properly.
Understanding Viscosity and Friction Properties for Motorcycle Engines
Car oil, especially energy-conserving varieties, often contains friction modifiers designed to improve fuel economy. Car oils may prioritize fuel economy additives or detergents tailored for emission systems like catalytic converters, which are irrelevant in a motorcycle's open-loop exhaust system.
More About Car oil in motorcycle
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