Electrical - Yamaha TZ125M1 Owner's Service Manual

ELECTRICAL/SPARK PLUG INSPECTION/
IGNITION TIMING CHECK
EC370000

ELECTRICAL

EC371001
SPARK PLUG INSPECTION
1. Remove:
• Spark plug
2. Inspect:
• Electrode 1
Wear/Damage ≥ Replace.
• Insulator color 2
Normal condition is a medium to light tan
color.
Distinctly different color ≥ Check the
engine condition.
NOTE:
When the engine runs for many hours at low
speeds, the spark plug insulator will become
sooty, even if the engine and carburetor are in
good operating condition.
3. Measure:
• Plug gap a
a
Use a wire gauge or thickness gauge.
Out of specification ≥ Regap.
%
Spark plug gap:
0.5~0.6 mm (0.020~0.024 in)
Standard spark plug:
R6385-105P
4. Clean the plug with a spark plug cleaner if
necessary.
5. Tighten:
• Spark plug
NOTE:
• Before installing a spark plug, clean the gas-
ket surface and plug surface.
• Finger-tighten a the spark plug before
torquing to specification b.
EC372022
IGNITION TIMING CHECK
1. Remove:
• Cowling
• Fuel tank
• Spark plug
3-37
INSP
ADJ
19 Nm (1.9 mdkg, 13 ftdlb)
T