Dinli DMX 450 Owner's Manual page 109

7-9-5. SPARK PLUG
Use NGK DCPR8E sparks.
Proper electrode gap is 0.8~0.9 mm
Spark plug torque is 250 kgf-cm.
CAUTION
Using non-recommended spark plugs may result in serious engine damage and may void your
emission-related warranty.
Spark plug condition is indicative of engine operation. The spark plug firing end condition should be
read after the engine has been warmed up and the vehicle has been driven at higher speeds.
Immediately check the spark plug for correct color.
Normal
The normal insulator tip is gray, tan or light brown. There will be few combustion deposits.
The electrodes are not burned or eroded. This indicates the proper type an heat range for the engine and the
service.
A white insulator tip indicates overheating.
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