Ignition Timing Check - Yamaha SR125 1997 Service Manual

SPARK PLUG INSPECTION/

IGNITION TIMING CHECK

5. Install:
: Spark plug
NOTE:
Before installing a spark plug, clean the gasket
surface and plug surface.
YP303052
IGNITION TIMING CHECK
NOTE:
Prior to checking the ignition timing, check all
electrical connections related to the ignition
system. Make sure all connections are tight and
free of corrosion and that all ground connec-
tions are tight.
1. Remove:
: Timing check plug
2. Attach:
: Timing light 1
Engine tachometer 2
(to the spark plug lead)
3. Check:
: Ignition timing
***************************************
Checking steps:
: Start the engine and let it warm up for several
minutes. Let the engine run at the specified
speed.
: Visually check the stationary pointer a to
verify it is within the required firing range b in-
dicated on the flywheel.
Incorrect firing range ! Check the ignition
system.
***************************************
NOTE:
Ignition timing is not adjustable.
3. Install:
: Timing check plug
3-8
INSP
ADJ
Timing light:
90890-03141
Engine tachometer:
90890-03113
Engine idling speed:
1,250 1,350 r/min
18 Nm (1.8 m:kg)