Info

Breaker cam Fiber cam follower Cam timing mark Condenser Contact points Lock screw

Eccentric adjusting screw Timing mark Adjusting stud lock nut Timing adjusting stud plate Wire stud screw Circuit breaker lever Pivot stud

Contact point and support Timing adjusting stud Cover retainer Control wire lock screw

SINGLE CONTACT POINT CIRCUIT BREAKER WITH AUTOMATIC ADVANCE (Fig. 5F-1A).

Automatic advance circuit breaker functions the same way as the manual advance circuit breaker except that the spark timing cam is advanced automatically as engine speed increases through action of the flyweights in the circuit breaker base. This insures correct spark timing to suit both starting and running requirements.

DOUBLE CONTACT POINT CIRCUIT BREAKER (Fig. 5F-1B).

Ignition spark is produced by operation of separate circuit breaker contact points and ignition coils for each spark plug. The breaking of each set of breaker points by a single-lobe cam on the timer shaft determines the spark timing. The single-lobe cam opens the breaker points, individually firing alternate cylinders every crankshaft revolution.

1966 Electra-Glide 1966 Sportster and Servi-car

1. Breaker cam 9.

2. Fiber cam follower

3. Cam timing mark 10.

4. Condenser 11.

5. Contact points 12.

6. Adjustable point lock screw 13.

7. Eccentric adjusting 14.

screw

8. Timing marks (1965 15.

model) 16.

Circuit breaker head nut (2) Circuit breaker head Wire stud screw Circuit breaker lever Pivot stud Contact point and support Stem clamp nut Stem clamp

Figure 5F-1. Single Contact Point Circuit Breaker Manual Advance

Figure 5 F-1A. Single Contact Point Circuit Breaker - Automatic Advance

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