Mineral-based motorcycle gear oil formulated specifically for use in high-performance V-Twin Sportster transmissions and primary chain cases. Robust formulation maintains film thickness and viscosity stability across all operating temperatures to minimize chain and gear wear. Advanced formula ensures optimal clutch engagement, facilitating smooth shifts and enabling maximum power even under extreme loads. For 1971 and newer Harley-Davidson® XR and XL Sportster transmissions and chain cases. Formulated for use in high-performance V-Twin Sportster transmissions and primary chain cases. Designed for 1971 and newer Harley-Davidson® XR and XL Sportster transmissions and chain cases. Shear-stable formula minimizes chain and gear wear. Ensures optimal clutch engagement, facilitating smooth shifts and enabling maximum power. Extends chain life by minimizing stretch and wear.