Yamaha SR125 Service Manual download pdf (Page 54)

3-8

SPARK PLUG INSPECTION/

IGNITION TIMING CHECK

INSP

ADJ

18 Nm (1.8 mkg)

NOTE:

***************************************

NOTE:

5. Install:

 Spark plug

Before installing a spark plug, clean the gasket

surface and plug surface.

YP303052

IGNITION TIMING CHECK

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

Engine tachometer

(to the spark plug lead)

Timing light:

90890-03141

Engine tachometer:

90890-03113

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.

Engine idling speed:

1,250  1,350 r/min

 Visually check the stationary pointer

verify it is within the required firing range

in-

dicated on the flywheel.

Incorrect firing range  Check the ignition

system.

Ignition timing is not adjustable.

3. Install:

 Timing check plug

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Comments to this Manuals

Ruchira 26 Jul 2025 | 07:58:41

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Yamaha SR125 Service Manual Page 54

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