On double contact breakers, mark on cam lobe must align with breaker lever fiber on contact points for front cylinder. This set of contact points is identified on breaker base by (F).

If fiber does not line up with cam lobe timing mark, lift circuit breaker assembly and turn shaft gear so engagement with driving gear is changed one tooth. Again check cam lobe timing mark for alignment with lever fiber. Repeat this procedure until gear engagement is attained which closely aligns cam lobe mark and lever fiber, then secure circuit breaker assembly to crankcase.

Adjust ignition timing. See previous paragraph "Checking and Adjusting Ignition Timing" in this section.

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