Yamaha XZ550RJ 1982 Service Manual page 169

Ignition spark gap test
1. Remove the sidecovers and fuel tank, and
disconnect the ignition coil leads from the
wiring harness and from the spark plugs.
2. Connect the Electro Tester as shown.
3. Connect a fully charged battery to the
tester.
4. Turn on the spark gap switch, and increase
the gap to maximum unless misfire occurs
first.
Minimum spark gap: 6mm (0.24 in)
Direct current resistance test.
Use the pocket tester to determine resistance
and continuity of primary and secondary coil
windings.
Standard value: Primary coil resistance:
2.75Ω ± 10% a t20°C (68°F)
Secondary coil resistance:
7.9KΩ ± 20% at 20°C (68°F)
Pickup coil
1. Remove the right sidecover.
2. Disconnect the pickup coil
from the TCI unit.
connector
169