Battery drains quickly and rendered useless
Posted: Fri Aug 02, 2013 8:38 am
I have a 77 GT550. The bike will start and run but quickly drains the battery which is then rendered unusable: will not recharge. I did substantial work before this, finding multiple shorts in the wiring harness which were repaired. I check the regulator rectifier according to manual specs with my multimeter, though I am a novice. I had the bike running great (it has less than 5000 miles on it). During my last test, I measured 12 V across the battery terminals while the bike was running, but it only ran briefly until the battery drained off. I have gone through two batteries this way, an expensive experiment. Now I don't know exactly where to begin again.
Hi,it should be at least 13.5 volts,rising to 14 volts or so at a constant 3,000rpm or better,something definately wrong with the charging system,has the alternator got any brush material left,check regulator/rectifier condition with the meter. I'm not real good with electrics,but others "here" are...