Clamp nut or bolts

Figure 5F-2, Circuit Breakers - Exploded View

NOTE: Flywheel is not marked for rear cylinder timing on 1961 Duo-Glide engines made prior to Engine No. 61FLH 7987 and piston position must be used as an alternative to flywheel timing marks as follows:

Piston position can be determined by using spark timing gage Part No. 95885-61 which screws into spark plug hole. Gage rod contacts piston top to indicate piston position. Gage rod has two marks. When engine is turned over so gage rod has moved to highest point, (rear cylinder piston at top dead center) set gage collar exactly at lower mark on gage rod. Piston position before top center is indicated when engine is turned over and piston moves so rod upper mark comes even with gage collar. If timing gage is not available, rear cylinder head can be removed and piston position measured with a scale or dial indicator.

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."

If contact points remain closed "light on" in the fully advanced position, timing is late - point contacts set too close together.

If contact points begin to open "light off" before circuit breaker is in fully advanced position, timing is early - point contacts set too far apart.

To correct rear cylinder timing, the breaker points must be readjusted so contact points just begin to open (timing light just flickers or goes off) when circuit breaker is fully advanced.

NOTE: This will result in a different point contact opening than original setting of .022 in.

Check the rear cylinder timing with timer cover installed, using same procedure as given in preceding paragraph heading, "Checking Timing," but using rear cylinder breaker points and rear cylinder flywheel timing mark.

NOTE: If engine is in chassis, test lamp can be connected to circuit breaker wire and engine (ground). With ignition turned on, lamp will light with points open and go off with points closed, exactly opposite from battery hookup previously described.

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