Gear drive for motorcycle speedometer - has lubricant slots in gear within totally enclosed casing providing dust exclusion

摘要

The drive has a housing (1) which has a central hole (2) which holds the drive housing onto the main engine housing. The toothed wheel (6) inside the housing meshes with a pinion (7) which is housed in the cylindrical casing on the side of the main housing (1). The toothed wheel has a flange which extends to the outside of the casing in order to enclose the drive. The wheel is fitted with slots (12) which stores lubricant during the life of the drive. The extended slots (13) are casting requirements for the plastic wheel.