2006-2009 Suzuki LT-Z50 QuadSport ATV Factory Service Manual, Page 171Get this manual
ELECTRICAL SYSTEM
INSPECTION
IGNITION COIL PRIMARY PEAK VOLTAGE Disconnect the spark plug cap Connect new spark plug to spark plug cap and ground it to the cylinder headNOTE: Make sure that the spark plug cap and spark plug are connected properly and the battery is fully-chargedMeasure ignition coil primary peak voltage with the multi-circuit tester in the following procedure Connect the multi-circuit tester with the peak voltage adaptor as follows+ Probe: BlackWhite lead wire or groundProbe: Black lead wire NOTE: Do not disconnect the ignition coil primary wires09900-25008: Multi-circuit tester set
Peak volt adaptor
When using the multi-circuit tester and peak volt adaptor, refer to the appropriate instruction manual Turn the ignition switch to the "ON" position Press the starter button and allow the engine to crank for few seconds, and then measure the ignition coil primary peak voltage Repeat the above procedure few times and measure the highest ignition coil primary peak voltageTester knob indication: Voltage) Ignition coil primary peak voltage: 150 and more