My dad had a Nylon sprocket on his kz 900. It was branded "NEP". He bought it after we had so much success using the nylon sprockets, offroad. His idea of maintenance was zero effort, so the idea of not needing lubrication (???) was where its at.
The chain size on his old kz was #630. Massive, heavy, and his chains never lasted much more than 7000-800 miles. The chain quality was nothing like we have, today, and his countenance schedule was sketchy, to say the least.
Of course, cheaper Nylon sprockets were released, and those were EBC like junk. It gave the concept a bad name, and they soon disappeared.
I seriously though we would have seen some sort of crazy composite sprocket, by now. The technology has probably gone far enough to where that possible.
Last edited by rcannon; 01-25-2018 at 07:16 PM.