kz750 charging issues

Hey guys, this is a particularity difficult situation i am in. my bike is at home 5 hours away and my dad has been riding it around quite a bit this spring. Its having some charging issues and i have directed him to get some deoxit and go front to back cleaning all the electrical connections, checking to make sure the battery (brand new) is holding a charge and functional.

i do have one question, i have a kz750 motor in my bike (650sr frame) and it has all worked fine for me. however i just thought that maybe the R/R was different in the two bikes and this might contribute to the issue. when i have searched on ebay for R/R the 650 and 750 come up as the same part. Is this true?

if not, i think im going to upgrade to a new stator and RR, just to be safe. i am also contemplating getting a new wiring harness made up just to be sure all the wiring is good.

if after my dad cleans all the electrical connections, assures the battery is good, and we still have charging issues i can assume that it is either the RR or stator am i correct?

I'd use this guide for troubleshooting: www.electrosport.com/technical- resources/diagnosis-center/fault-finding-guide

thanks Mfolks, as usual very prompt on help, i actually found this link in another thread and forwarded it to my dad, we will see what he says, i dont know if he is comfortable enough to do the tests himself, and the bike is 5 hours away from me... if i had to guess its just the connections someplace.... the connectors in the headlight bucket are a mess and i have an issue with the high beam and guage lights already.

i hope that cleaning all connections and some basic tests will help diagnose the problem.

cheers,
ian

It can be a weak battery,possible burned out phase(s) on the stator of the alternator(most are 3 phase, although the Kz650's had single and three phase systems,depending on the model and year),corroded electrical connections, or a rectifier/regulator going out.

Check the heavy duty cables going from the batery to the starter solenoid,engine mounting bolt, all all the grounds(the ones with the Black/yellow stripes).