Inspecting The Spark Plug - Derbi GPR 125 Racing Workshop Manual

- Loosen the throttle cable locknut (2).
- Turn the adjuster (1) inwards or outwards until the speci-
fied play is obtained.
Turning inwards (a) = Increasing the play.
Turning outwards (b) = Reducing the play.
- Tighten the locknut.
N.B.
IF THE PLAY IS STILL INCORRECT, ADJUST IT USING THE
ADJUSTER BELOW THE TWIST GRIP.
WARNING
AFTER ADJUSTMENT, TURN THE HANDLE IN BOTH DI-
RECTIONS TO ENSURE THAT THERE IS NO NO-LOAD VA-
RIATION .
I I
NSPECTING THE SPARK PLUG NSPECTING THE SPARK PLUG
1. Extract:
- Spark plug connector.
- Spark plug.
ATTENTION
BEFORE REMOVING THE SPARK PLUG, BLOW AROUND IT
WITH COMPRESSED AIR TO REMOVE ANY DIRT, THEREBY
PREVENTING THIS FROM FALLING INTO THE ENGINE.
2. Check:
- Spark plug type
Incorrect => Replace.
Standard spark plug:
NGK BR8ES
3. Inspect:
- Electrode (1).
Damage/wear => Replace.
- Insulator (2).
Abnormal colour => Replace.
The normal colour is light brown.
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