Back when Dinosaurs roamed the earth and 2Door & I were teens, 2 stroke bikes had automatic chain oilers. A hose ran to the motor sprocket from the main oil tank supply. Mostly on dirt bikes. It lubed the motor & chain. Mixed in the carb. A 7.00 can of motorcycle chain lube will last most riders 6 months or more. WD-40 is a wonderful lube but won't hold up but a very few miles. Great for cleaning, but wrong for drive chains. I did use it to keep the rust off of my chrome plated chain that kept my Levis up tho.