When replacing the contacts breaker it must be position correctly reletive to the exhaust camshaf. A pin is provided in the exhaust camshaft and a slot in the taper end of the auto advance spindle serves as a location
The ingnation contact breaker is in the timing cover on the right of the motorcycle and is driven by the exhaust camshaft. There is a round chrominium-plated cover over it held by two screws. To remove the timing cover ( cam and auto-advance assembly) must be release from the camshaft. to realese the contact breaker remove the central bolt and use extractor tool.. ...it into the end of the hollow spindle
For timing purpose two alternative methods have been used for setting the engine in the 38* fully advance position.