Note

Before starting this procedure, check all electrical connections related to the ignition system. Make sure all connections are tight and free of corrosion and that all ground connections are tight.

1. Check the sensor air gap as described in this chapter.

2. Remove the plug from the timing hole on the left side of the engine (Figure 78). A clear plastic viewing plug is available from Harley-Davidson dealers to minimize oil spray. Make sure the plug doesn't contact the flywheel.

3. Connect a portable tachometer following the manufacturer's instructions. The bike's tach is not accurate enough in the low rpm range for this adjustment.

4. Connect a timing light to the front cylinder spark plug wire following the manufacturer's instructions.

CAUTION The use of a timing light with an inductive clamp-on pickup is recommended. If you must use another type, do not puncture the spark plug wire or cap, use an adaptor.

5. Start the engine and allow it to idle at 2,000 rpm. If necessary, adjust idle as described in this chapter.

6. Aim the timing light at the timing inspection hole. At 2,000 rpm, the front cylinder's advance mark should appear in the center of the inspection window (Figure 80). If the mark is not in the correct position, loosen the timer plate screws (2, Figure 85) and turn the timer plate as required by prying the notch (8, Figure 85) with a screwdriver. Observe the front cylinder timing mark with the strobe light and tighten the timer plate screws when timing is correct.

7. Install the ignition timer cover and the inspection hole plug.

BREAKERLESS IGNITION SERVICE (1980-ON)

Ignition Timing Inspection and Adjustment

1. Remove the plug from the timing hole on the left side of the engine (Figure 78). A clear plastic viewing plug is available from Harley-Davidson dealers to minimize oil spray. Make sure the plug doesn't contact the flywheel.

2. Connect a portable tachometer following the manufacturer's instructions. The bike's tach is not accurate enough in the low rpm range for this adjustment.

3. Connect a timing light to the front cylinder spark plug wire following the manufacturer's instructions.

CAUTION The use of a timing light with an inductive clamp-on pickup is recommended.

If you must use another type, do not puncture the spark plug wire or cap, use an adaptor.

4. Start the engine and allow to idle at 2,000 rpm. If necessary, adjust idle as described in this chapter.

5. Aim the timing light at the timing inspection hole. At 2,000 rpm, the front cylinder's advance mark should appear in the center of the inspection window. Figure 80 shows the advance mark for early 1980 engines up to engine number 1480-128-001. Figure 86 shows the single drilled dot that shows full advance for the front cylinder on later engines. The double "figure 8" drilled marks represent full advance for the rear cylinder. If the proper mark does

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