Suzuki GSX-R 1000 Service Manual: Spark plug inspection and cleaning

Inspect spark plug every 6 000 km (4 000 miles, 12 months)

Heat range

1. Remove the spark plugs. Refer to “ignition coil and spark plug removal and installation” in section 1h .
2.  Check spark plug heat range by observing electrode color. If the electrode of the spark plug is wet appearing or dark color, replace the spark plug with hotter type one. If it is white or glazed appearing, replace the spark plug with colder type one.

Heat range

3. After finishing the spark plug inspection, reinstall the removed parts.

Tightening torque

Spark plug gap spark plug: 11 n·m (1.1 Kgf-m, 8.0 Lbf-ft)

1. Remove the spark plugs. Refer to “ignition coil and spark plug removal and installation” in section 1h .
2. Measure the spark plug gap using a wire gauge. If it is not within the specification, replace the spark plug.

Caution  To prevent the damage of iridium center electrode, use a wire gauge to check the gap.  Never adjust the spark plug gap.

Spark plug gap 0.8 – 0.9 Mm (0.031 – 0.035 In)

3. After finishing the spark plug inspection, reinstall the removed parts.

Tightening torque spark plug: 11 n·m (1.1 Kgf-m, 8.0 Lbf-ft)

Electrodes condition

1. Remove the spark plugs. Refer to “ignition coil and spark plug removal and installation” in section 1h .
2.  Check the worn or burnt condition of the electrodes.

   If it is extremely worn or burnt, replace the spark plug. And also replace the spark plug if it has a broken insulator, or damaged thread.

Caution confirm the thread size and reach when replacing the plug. If the reach is too short, carbon will be deposited on the screw portion of the plug hole and engine damage may result.

3. After finishing the spark plug inspection, reinstall the removed parts.

Tightening torque spark plug: 11 n·m (1.1 Kgf-m, 8.0 Lbf-ft)