Suzuki DR 125, Service Manual

Page: 20 / 222

PERIODIC MAINTENANCE 2-7
NOTE:
If the cam chain is noisy after having been adjusted, the push
rod is probably sticking. Remove the cam chain tension adjuster,
clean and lubricate the push rod to obtain smooth movement
and proper tensioning action.
SPARK PLUG
• Disconnect the spark plug cap
1
and remove the spark plug
2
.
!
09930-10121: Spark plug wrench set
"
• Carbon deposits on the spark plug will prevent good sparking
and may cause the engine to misfire. Be sure to clean the car-
bon deposits off periodically.
• If the center electrode is fairly worn down, the spark plug
should be replaced and the spark plug gap set to the specifi-
cation using a thickness gauge.
!
09900-20804: Thickness gauge
#
Spark plug gap: 0.6 – 0.8 mm (0.024 – 0.031 in)
• Check the spark plug for burns. If any abnormalities are
found, replace the spark plug as indicated below.
Inspect every 6 months.
Replace every 12 months.
NGK DENSO
STD DR8EA X24ESR-U
Confirm the thread size and reach when replacing the
spark plug. If the reach is too short, carbon will be
deposited on the screw portion of the plug hole and
engine damage may result.