Yamaha YFM250XL(C) Service Manual page 279

for EUR/AUS
2.Ignition spark gap
Disconnect the spark plug cap from the
spark plug.
Connect the ignition checker 1 as
shown.
2 Spark plug cap
Turn the main switch to "ON".
Check the ignition spark gap a.
Crank the engine by pushing the starter
switch and increase the spark gap until a
misfire occurs.
Minimum spark gap:
6.0 mm (0.24 in)
3.Spark plug cap resistance
Remove the spark plug cap.
Connect the pocket tester (Ω × 1k) to the
spark plug cap.
Check that the spark plug cap has the
specified resistance.
Spark plug cap resistance:
10 kΩ at 20 ˚C (68˚F)
*
OUT OF
SPECIFICATION
OR NO SPARK
MEETS
SPECIFICATION
8 - 9
IGNITION SYSTEM
MEETS SPECIFICATION
The ignition system is not faulty.
OUT OF SPECIFICATION
Replace the spark plug cap.
– +
ELEC
8