CHK
ADJ
CHECKING THE SPARK PLUG/
CHECKING THE IGNITION TIMING
7. Install:
•
spark plug
8. Connect:
• spark plug cap
CHECKING THE IGNITION TIMING
1. Remove:
• timing mark accessing screw
1
2. Connect:
• timing light
2
(onto the spark plug lead)
• inductive tachometer
3
3. Check:
• ignition timing
a. Start the engine, warm it up for several minutes,
and then let it run at the specified engine idling
speed.
b. Check that the stationary pointer
a
is within the
firing range
b
on the AC magneto.
Out of firing range
-->
Check the ignition system.
Spark plug
18 N.m (1.8 kgf.m, 13.3 ft.lb)
Before installing the spark plug, clean the spark plug
and gasket surface.
NOTE:
Timing light
2
2
2
2
2
90890-03141
Inductive tachometer
3
3
3
3
3
90890-06760
TTTTTTTTTTTTTTTTTTTTTTTTTTTTT
T
T
TTTTTT
T
T
T
T
Engine idling speed
1,300 ~ 1,500 rpm
T TT
T TT
T TT
T TT
T TT
T TT
T TT
T TT
T TT
T T
T
T
T TT
T TT
T
T
T
T
The ignition timing is not adjustable.
NOTE:
3-15
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.
NOTE:
b
a
3
2
1
Summary of Contents for YBR250 2007
Page 1: ...YBR250 SERVICE MANUAL 5D1 F8197 E0 2007 ...
Page 2: ......
Page 359: ...YAMAHA MOTOR DA AMAZÔNIA LTDA ...
