Also remember that the bronze (not Oilite) bushes on the layshaft are lubricated through 1/8" radial holes in the two free gears. As Richardson or someone says, an eggcup of oil occasionally is a good idea. I seem to remember a par by P.E.I. to the effect that grease channels, but doesn't leak, oil leaks, but lubricates. Also folks, the Spares Co. site has all the right "Vincent" part numbers which agree with the Spares List, although I concede that the Draganfly illustrations are much clearer. Many years ago at the Peppin Point rally my gearbox screeched and a bit of oil cured it immediately, just like the book said.NOTE: Most, if not all Vincent gearboxes, 1949 and later, have these bushes, earlier gearboxes do not.