Yamaha YFM350XP Supplementary Service Manual page 22

Spark plug gap:
0.8 ~ 0.9 mm (0.031 ~ 0.035 in)
For USA and CDN
4.Ignition spark gap
Disconnect the spark plug cap from the
●
spark plug.
Connect the dynamic spark tester 1 as
●
shown.
2 Spark plug cap
3 Spark plug
Turn the main switch to "ON".
●
Check the ignition spark gap.
●
Crank the engine by pushing the starter
●
switch, and increase the spark gap until a
misfiring occurs.
Minimum spark gap:
6.0 mm (0.24 in)
For Europe and Oceania
4.Ignition spark gap
Disconnect the spark plug cap from the
●
spark plug.
Connect the dynamic spark tester 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
misfiring occurs.
Minimum spark gap:
6.0 mm (0.24 in)
*
CORRECT
OUT OF
SPECIFICATION
OR NO SPARK
– 16 –
IGNITION SYSTEM
INCORRECT
Repair or replace the spark plug.
MEETS SPECIFICATION
The ignition system is not faulty.
MEETS SPECIFICATION
The ignition system is not faulty.
– +
ELEC