Yamaha XP500 2001 Service Manual page 337

EAS00743
4. Ignition spark gap
S The following procedure applies to all of the
spark plugs.
S Disconnect the spark plug cap from the
spark plug.
S Connect the ignition checker
S
2 Spark plug cap
S Set the main switch to "ON".
S Measure the ignition spark gap
S Crank the engine by pushing the start switch
and gradually increase the spark gap until a
misfire occurs.
Minimum ignition spark gap
0.8 mm
S Is there a spark and is the spark gap within
specification?
NO
EAS00745
5. Spark plug cap resistance
S The following procedure applies to all of the
spark plug caps.
S Remove the spark plug cap.
S Connect the pocket tester (Ω
the spark plug cap as shown.
S Measure the spark plug cap resistance.
1 as shown.
a
.
YES
The ignition system
is OK.
1k range) to
IGNITION SYSTEM
Spark plug cap resistance
10 kΩ at 20_C
S Is the spark plug cap OK?
YES
EAS00747
6. Ignition coil resistance
S The following procedure applies to all of the
ignition coils.
S Disconnect the ignition coil leads from the
wireharness.
S Connect the pocket tester (Ω
ignition coil as shown.
Tester positive probe ! red/black
Tester negative probe ! orange (gray)
S Measure the primary coil resistance.
Primary coil resistance
0.204 X 0.276 Ω at 20_C
S Connect the pocket tester (Ω
ignition coil as shown.
S Measure the secondary coil for the specified
resistance.
Tester posltlve probe ! red/black
Tester negative probe ! spark plug lead
8-15
ELEC
NO
Replace the spark
plug cap.
1) to the
1k) to the