Duoglide Model

Remove the front cylinder head from the engine on models prior to 1962 to provide sufficient clearance for removal of circuit breaker assembly. See Duo-Glide Cylinder Head, Section 3B. Using circuit breaker wrench, Part 9*4501-56, remove two screws (21A). Shaft and housing assembly can be lifted from gear case. On manual advance types, slip base (10 or 10A) and retainer (20) from housing. On 1965 automatic advance type, remove nuts and washers (20A) then slip base (10B) from housing. On 1966 automatic advance type, remove stem clamp nut (35) and clamp (34) to free entire circuit breaker from crankcase.

1964 AND EARLIER SPORTSTER AND 1963 AND EARLIER SERVI-CAR MODELS Remove base (10) and retainer (20) exposing two screws (21) securing shaft and housing assembly to gear case cover. Remove screws (21) and lift shaft and housing from gear case cover.

Figure 5F-3B. Checking Timing with Strobe-Lite
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