2006-2009 Suzuki LT-Z50 QuadSport ATV Factory Service Manual, Page 161Get this manual
ELECTRICAL SYSTEM
GENERATOR NO-LOAD PERFORMANCE Remove the left frame cover( 5-4) Disconnect the regulatorrectifier coupler Start the engine and keep it running at 800 rminMeasure the voltage between WR wire and ground with the multi-circuit testerIf the tester reads under the specified value, replace the generator coil with new one09900-25008: Multi-circuit tester set Tester knob indication: Voltage () Generator no-load performance: 20 and more at 800 rmin (When engine is cold)