Checking The Spark Plugs; Checking The Ignition Timing - Yamaha MT-01 Service Manual

Manuals by Motomatrix / www.motomatrix.co.uk
c. Tighten the locknut "1".
1
EWA12910
WARNING
After adjusting the throttle cable free play,
start the engine and turn the handlebar to the
right and to the left to ensure that this does
not cause the engine idling speed to change.
L LLL L LLL L L LLL L L LLL
4. Install:
• Pressure regulator cover
Pressure regulator cover bolt
9 Nm (0.9 m·kg, 6.5 ft·lb)
EAS20680

CHECKING THE SPARK PLUGS

The following procedure applies to all of the
spark plugs.
1. Remove:
• Seat
Refer to "GENERAL CHASSIS" on page 4-1.
• Fuel tank
Refer to "FUEL TANK" on page 6-1.
2. Disconnect:
• Spark plug cap
3. Remove:
• Spark plug
ECA13320
CAUTION:
Before removing the spark plugs, blow away
any dirt accumulated in the spark plug wells
with compressed air to prevent it from falling
into the cylinders.
4. Check:
• Spark plug type
Incorrect → Change.
Manufacturer/model
NGK/DPR7EA-9
Manufacturer/model
DENSO/X22EPR-U9
Email: info@motomatrix.co.uk
2
a
b
L L LLL L L LLL L LLL
5. Check:
• Electrode "1"
Damage/wear → Replace the spark plug.
• Insulator "2"
Abnormal color → Replace the spark plug.
Normal color is medium-to-light tan.
6. Clean:
• Spark plug
(with a spark plug cleaner or wire brush)
7. Measure:
• Spark plug gap "a"
(with a wire thickness gauge)
Out of specification → Regap.
Spark plug gap
0.8–0.9 mm (0.031–0.035 in)
8. Install:
• Spark plug
Spark plug
18 Nm (1.8 m·kg, 13 ft·lb)
NOTE:
Before installing the spark plug, clean the spark
plug and gasket surface.
9. Connect:
• Spark plug cap
10.Install:
• Fuel tank
Refer to "FUEL TANK" on page 6-1.
• Seat
Refer to "GENERAL CHASSIS" on page 4-1.
EAS20700

CHECKING THE IGNITION TIMING

NOTE:
Prior to checking the ignition timing, check the
wiring connections of the entire ignition system.
Make sure all connections are tight and free of
corrosion.
3-8
ENGINE