Mineral-based motorcycle gear oil formulated specifically for use in high-performance V-Twin 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, preventing slippage and facilitating smooth shifts even under extreme loads. For all 1984 and newer Harley-Davidson® models with wet diaphragm spring clutches. Formulated for use in high performance V-Twin transmissions and primary chain cases. Designed for all 1984 and newer Harley-Davidson® models with wet diaphragm spring clutches. Shear-stable formula minimizes chain and gear wear. Ensures optimal clutch engagement, prevents slippage and facilitates smooth shifts. Extends chain life by minimizing stretch and wear.