Yamaha XZ550RJ 1982 Service Manual page 170

3. Check the resistance of the pickup coil
windings with the pocket tester. If the resis-
tance is not within specification, replace the
pickup coil assembly.
Pickup coil resistance:
110Ω ± 10% at 20°C (68°F)
(Red- Black, White- Black)
Spark plug
The life of a spark plug and its coloring vary
according to the habits of the rider. At each periodic
inspection, replace burned or fouled plugs with new
ones of the specified type. It is actually economical
to install new plugs often since it will tend to keep
the engine in good condition and prevent excessive
fuel consumption.
1. Inspect and clean the spark plug every
4000 km (2500 mi), and replace after initial
13,000 km (8000 mi).
2. Clean the electrodes
adjust the electrode gap to the specification.
Be sure to use the proper reach, type, and
electrode gap plug (s) as a replacement
to avoid overheating, fouling, or piston
damage.
Type:
D8EA(NGK) or X24ES-U
(NIPPON DENSO)
Electrode gap:
0.6 ~ 0.7 mm (0.024 ~0.028 in)
Tightening torque:
20 Nm (2.0m-kg, 14.5ft-lb)
Sidestand relay
1. Remove the right sidecover, TCI unit, and
reservoir tank from the frame.
of carbon, and
2. Check the resistance of the relay coil wind-
ings with the pocket tester. If the resistance
is not within specification, replace the relay.
3. Check the relay contact breaker points with
the pocket tester and a 12 volt battery.
Connect the leads as shown in the illustra-
tion. If the resistance readings do not equal
those shown in the illustration, replace the
relay.
1. When the battery is connected
2. When the battery is disconnected
3. 12 volt battery
170