2003 Suzuki LT-Z400 Factory Service Manual, Page 250Get this manual
NO-LOAD Disconnect the the and run it at 000 rknin, Measure the AC voltage between the lead wires of the the multi circuit testerIf the voltage is under the specified tile AC ator with new one, 09900-25008: Multi circuit tester set Tachometer Tester knob Generator no-load performance engine is More than 65 (AC) at 000