SAE 80w90 Motorcycle Hypoid Gear Oil by Spectro. Formulated with the highest density and highest VI petroleum base stocks available. Special EP additives are used to reduce pinion gear wear. Spectro Gear Lubricant is designed for the final drives and transmissions of all shaft-drive motorcycles ...

SAE 75w140 Full Synthetic Heavy Duty Gear Oil for V-Twin Motorcycles. Top of the line, fully synthetic lubricant formulated specifically to run in Harley-Davidson® Big-Twin transmissions. Spectro combines the leading synthetic PAO base oils with the most advanced additive package available today...

SAE 85w140 Heavy-Duty Gear Guard Oil by Spectro. Premium quality lubricant formulated specifically to run in motorcycle transmissions to prevent rust, corrosion, oxidation and to combat foaming and gear pitting. Formulated specifically for Big Twin transmissions, it reduces drag, friction loss, ...

Heavy Duty Primary Chaincase / Transmission Fluid by Spectro. This shear-stable petroleum is designed to withstand the punishment of high loads, and contains special polymers to provide exceptional clutch engagement and temperature stability. Meets full OEM requirements, and should be used accor...

Platinum Level, Heavy Duty, Full Synthetic Sportster Transmission Lube by Spectro. Formulated for V-Twin motorcycles, Harley Sportster transmissions, and all Harley-Davidson® primary chaincases. A full synthetic transmission lubricant engineered to work in all applications where the same oil lub...

Full Synthetic Transmission Oil, For Helical and Straight-Cut Gears. In response to Harley-Davidson® owners complaining about their great, but noisy, new 6-speed transmissions, Spectro developed this Heavy Duty Platinum 6 Speed Transmission Oil. Fully synthetic, it is formulated to significantly...