Ignition advance and timing degree markings are on the metal flange

the Cannonball SSK System starts the engine by turning the transmission mainshaft

'vintage' engine complete with carburetor and ignition

or use this as a component in a low grab rail or tall sissy bar

#PSHC-204 1/4-24 x 7/8 length Polished Chrome Socket Head Allen Bolt - 10 Pack

#3724-3 Truss Rod Right Front Coupling Stud 1951-1973 Harley-Davidson Servi-car - Parkerized Gas Cap Type_Vintage British Ignition advance and timing degreeParkerized reproduction of OEM# 83057 51 coupling stud, 7793 nut and lockwasher used on 1951 1973 Harley Davidson Servi car. Made in Ohio, USA.