Cup cover Flat - Step for Harley - Davidson We offer a beautiful coupling lid here. The derby cover is made of solid steel sheet. The clutch lid fits Allen Harley Davidson Big Twin models from 1970 - 1998. We conduct this beautiful lid for all Harley engines in chrome from 1970. In our program you will find many other beautiful custom parts, such as exhaust systems, handlebars, riser, etc. . .