Thursday, 20 September 2012
Norton Model 19 Restoration
Timing chest ..crank pinion engages exhaust cam and it engages the inlet cam so they run as a train of gears Norton said this reduced engine noise ???yet they reverted to the timing pinion engaging both cam wheels by the late 1940's ,this motor requires a clockwise drive magneto which I do not as yet have .Note early style finger followers riding on the cam lobes , cam timing became the net result of the follower shape interacting with the cam profile , this motor used flat followers note layer of hardface stellite ??