Main Motorcycle: the ones that run
Join Date: Jan 2010
Location: Land of Enchantment
Other Motorcycle: The ones that don't run
Extra Motorcycle: Lots
All pre-unit gearboxes on bikes equipped with nacelles ("49 and later) had a cable coming out of the speedo drive on the right side. Earlier boxes do not have this cable. When the rigid box changed to the swing arm type the cable remained. It was finally changed to the rear wheel with the advent of unit engines. the speedo drive is a seperate unit on pre-nacelle models.