This unique lubricant was developed for Harley-Davidson owners who were unhappy about their noisy 6-speed transmission. It provides smoother shifting, reduces fifth gear whine and eliminates clunks. Spectro’s proprietary formula uses G4 Technology, special additives that provide additional anti-wear protection, higher film strength between the gears, and reduces drag while extending gear life. High loads and extreme heat do not affect the oil, so it performs excellently when pushed hard and long. A.P.I. GL-5 rated. Dyed red. Exceeds all known OEM and Harley-Davidson warranty requirements.

Spectro Oils 20W50 Heavy Duty Platinum Full Synthetic

Courtesy of Spectro Oils

Engineered specifically for Harley-Davidson high-performance engines and other high-output V-Twin motors. Spectro Heavy Duty Platinum Full Synthetic uses our G4 Technology to dramatically increase throttle response and horsepower. Formulated with a special additive package to combat high heat and stress which is found in air-cooled V-Twin engines. Exceeds all known OEM and Harley-Davidson warranty requirements.

Heavy Duty Primary Chaincase Oil

Courtesy of Spectro Oils

This sheer stable petroleum is designed to withstand the punishment of high loads, and contains special polymers to provide exceptional clutch engagement and temperature stability. Formulated specifically for Harley Sportster and Big Twin applications. Low drag, low friction loss SAE 85w viscosity eliminates clutch “drag” and slipping. Exceeds all known OEM and Harley-Davidson warranty requirements.

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