First, it acts as the main transmission, transferring power from the engine to the rear wheel through a set of helical gears. They allow for extended drain intervals of up to 50,000 miles and provide a noticeable improvement in clutch feel and gear whine reduction, though they come at a significantly higher initial cost.
Enhancing Harley Davidson Clutch Feel with the Right Primary Oil
Some high-performance oils even include anti-wear additives like zinc or phosphorus compounds to protect the hypoid gears found in the transmission portion of the primary case. Healthy oil should be a clear amber or honey color.
While beneficial in a car, these additives are detrimental to a Harley clutch, causing excessive slippage and burn-off. Viscosity: The Core Specification Viscosity, measured in SAE grades, is the most fundamental property to consider when choosing primary oil.
Enhancing Clutch Feel with the Right Primary Oil for Harley Davidson
The Drain and Fill Process. While the factory schedule often suggests a change every 5,000 miles, riders who frequently subject their bikes to heavy loads, stop-and-go traffic, or track days may need to shorten this interval.
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