Charging system is failing on 1989 kawasaki ninja zx-10

SOURCE: the battery on my 89 ninja 750 wont stay charged

i would first try a new battery if that don't work the magneto may be bad the battery if it has a dead cell could short the magneto

SOURCE: My 1987 Kawasaki is losing it's charge! new battery keeps dying

FIRST OFF, EVEN THOUGH THE BATTERY IS NEW TO YOU, IT MAY HAVE BEEN ON THE SHELF AT THE DEALER FOR SOME TIIME. VERIFY A GOOD BATTERY WITH THE APPROPRIATE TESTER. AFTER THAT YOU CAN CHECK YOUR STATOR BY VERIFYING CONTINUITY AND OPENS IN THE STATOR HARNESS. EASIER WAY IS TO DISCONNECT THE BATTERY AFTER YOU START THE BIKE AND IF IT CONTINUES TO RUN THE STATOR IS LIKELY OK. AND YOU SHOULD LOOK AT THE REG/RECT AT THAT POINT. YOU'LL NEED CORRECT MEASUREMENTS FOR THE READOUTS ON THESE TESTS. QUICK CHECK THE STATOR BY TESTING ACROSS THE 3 YELLOW LEADS. YOU SHOULD GET CONT. WITH ANY COMBINATION OF THE THREE WIRES. NOW TEST EASH YELLOW LEAD TO GROUND. THERE SHOULD BE "NO" CONT. BETWEEN ANY YELLOW AND GROUND. IF THERE IS, IT IS SHORTED AND WILL NEED REPLACING.
ON A BIKE OF THIS AGE IT ISNT UNUSUAL FOR THE STARTER BUTTON TO "RESIST" SOMETIMES. THIS IS IN THE PSUH BUTTON ITSELF.SOMETIMES YOU CAN REPAIR THESE CONTACTS AND SOMETIMES YOU CANT. IF IT CLICKS WHEN YOU PRESS THE START BUTTON, THAT COULD BE THE START RELAY OR A BAD WIRE CONNECTION. CHECK THESE ALSO WHEN YOU CHECK YOUR BATTERY!

SOURCE: On my 1989 kawasaki Ninja gpx 750 r The battery

its not been charged by the alternator so you have to change the alternator is not a massive job to fix can be a diy job

SOURCE: I have a 2001 kawasaki

Find a manual here free


http://www.repairmanualclub.com/motomanuals/index.php

SOURCE: hi im having problems with

hello carl...sounds like you might have a charging system problem. If you have a volt meter you can check it out. You can test at the battery. With the meter leads, red on positive, black on negative, you should have 13.5-14.5 volts direct current with engine at 3500 RPM. I hope this helps.