Note

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.

1963 & EARLIER SERVI-CAR

1964 & EARLIER SPORTSTER MANUAL CIRCUIT BREAKERS

Remove spark plugs to permit engine to turn easily; remove screw plug from timing inspection hole in left side of crankcase. Telescope front push rod cover so that opening and closing of valve can be observed. Turn engine in direction in which it runs until front piston is on compression stroke (just after front intake valve closes) and continue turning engine very slowly (less than 1/2 revolution) until advance timing mark on flywheel is aligned in the inspection hole, as shown in Figure 5F-3

Install a new circuit breaker gasket (23) using gasket sealer. Insert circuit breaker shaft and stem assembly into gear case cover with wire (12, Fig. 5F-2) inserted in hole of stem flange. Before engaging circuit breaker driving gear, turn shaft counterclockwise, approximately 60 degrees from position where mark (3, Fig. 5F-1) on cam lobe lines up with breaker lever fiber block. Insert screws (21, Fig. 5F-2) snug, but not tight. Temporarily position base on shaft and stem assembly in fully advanced position.

Observe how closely mark on cam lobe lines up with lever fiber. If it does not line up, remove screws (21, Fig. 5F-2), lift circuit breaker shaft and stem assembly from gear case. Turn shaft gear so its engagement with its driving gear is changed on tooth. Check again according to breaker cam mark. Repeat this procedure until gear engagement is attained which closely aligns mark on cam with breaker lever fiber. Then tighten screws (21, Fig. 5F-2).

Wrap wire (12) clockwise around shaft (29) and install base retainer (20) over wire, retainer end facing down and towards front cylinder (as positioned on motorcycle). Engage cover retainer with holes in base and register retainer ends in locating notches of base retainer (20) An easy way to engage retainer end with retainer notch is to insert cover retainer (2) under flats of base retainer (20). Then, with a screwdriver, move base retainer (20) until its notches register with ends of retainer (2).

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

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