Remove the spark plug cap.
Connect the new spark plug to the spark plug cap and «ground» it to the cylinder head.
![](https://motoinstruction.ru/img/suzuki/4/112975.jpg)
Note. Make sure the spark plug cap and spark plug are securely connected.
Warning! Do not allow the spark plug to touch the cylinder head coating, otherwise the cylinder head coating may be damaged.
To measure the peak voltage on the primary winding of the ignition coil, you must use a multitester in the following order.
Connect the multitester to the peak voltage adapter as follows:
- (+) probe: Black/White wire;
- (-) probe: White/Blue wire.
![](https://motoinstruction.ru/img/suzuki/4/112976.jpg)
Note. Do not disconnect the input wires from the ignition coil.
09900-25008: multitester.
Warning! Before using the multitester and peak voltage adapter, make sure that the actions comply with the instructions for the devices.
Place the gearbox in neutral and turn the ignition key to position «Included».
Squeeze the clutch lever.
Press the starter button and crank the engine for a few seconds, then measure the peak voltage at the ignition coil primary.
Repeat the above procedure several times and take the highest peak voltage value.
![](https://motoinstruction.ru/img/suzuki/4/112977.jpg)
Tester pen installation: Constant voltage
Peak voltage on the primary winding of the ignition coil: not less than 150 V
Warning! When taking measurements, do not touch the tester probes and the spark plug to prevent electric shock.
If the voltage is below the specified value, check the ignition coil (section 6-17).