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Check the contact point gap (10) with a feeler gage. If it is not exactly 0.022-in., when the cam follower (1) is on one of the high points of the cam (2), adjustment is necessary. Incorrect gap spacing affects ignition timing. To adjust, loosen the two lockscrews (12) and move the adjustable contact point to provide a contact point gap of exactly 0.022-in. Retighten the lockscrews and again check the gap to make sure that it remains correct.

With circuit breaker fully advanced against its stop and flywheel timing mark for rear cylinder correctly positioned as shown in Fig. 5F-3, contact points should just begin to open, "light off." The instant direction is reversed (spark retarded from full advance position), points should begin to close, "light on."

Flywheel timing mark: O.H.V. Engine, at rear edge of inspection hole in left crankcase,

Arrow indicates direction in which engine runs.

Contact point gap. Gap fully open (breaker lever fibre on highest point of cam) should be .022". Wrong gap affects time of ignition.

mark on breaker cam (registers with breaker lever fibre), and mark on circuit breaker head aligned with outer edge of timing adjusting stud plate indicates original factory timing.

Narrow cam times front cylinder; wide cam times rear cylinder. Cam should be lubricated occasionally with a very light application of grease.

After loosening timing stud lock nut, circuit breaker head can be shifted to adjust timing. (Not illustrated.)

Advance and retard lever not used. Timing adjusting stud controls movement of circuit breaker head; counter-clockwise position is advanced clockwise position is retarded.

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