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Help...Battery boil over....Voltage prob.

  • Thread starter Thread starter Anonymous
  • Start date Start date
A

Anonymous

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Hey everyone, My 82 GS300L Failed to start yesterday, slow cranked about twice then dead batt. Checked the battery and it was dry as a bone. I know it was full about 3 weeks ago. I assumed it boiled all the water out. Following advice from a freind I checked the voltage of the batt. (after refill of water) with the engine running. At normall idle it was about 14.1 V, reved up a bit(no TACH) it was around 14.8V But the longer it ran the higher the voltage got, after about 10 minutes it was reading about 15.7V idle and 16.6V at higher rpms. And i could see the batt. starting to bubble so I shut it off. What is the standard Volts to the battery? And What could be causing my over voltage, regulator/rectifier? Any help is greatly appreciated, I am very new to motorcycles and have limited knowledge on them.
 
Your regulator/rectifier isnt any good. Throw it in the trash and replace it.
Maximum output voltage at any rpm should not exceed 14.8

Earl
 
Thanks Earl, Thats what I was looking for. I've been searching through some old forum qestions and see alot of problems with stators, could the stator still be ok if the reg./rec. is bad?
 
the normal max you should see is 14.5 volts, and that is on the high side.
your regulator is not doing its job.
one thing you should try before replacing the regulator rectifier, is to run a separate ground wire from the reg/rect mount to the battery ground terminal.
if the regulator is not grounded good it can not regulate the voltage correctly. Suzuki's method of grounding them is pretty poor.

I work on large trucks for a living, and I think the people who designed them, also own/owned GS's the alternators on them are bolted directly to the engine (good ground) and they also have a very large separate ground cable as well.
 
I will definatley try that first, I'd much rather install a ground than pay the 143 bucks that they seem to cost.
 
The stator can be fine even though the R/R is faulty.

Earl


Zombie Jim said:
Thanks Earl, Thats what I was looking for. I've been searching through some old forum qestions and see alot of problems with stators, could the stator still be ok if the reg./rec. is bad?
Click to expand...
 
Zombie Jim said:
I will definatley try that first, I'd much rather install a ground than pay the 143 bucks that they seem to cost.
Click to expand...

The $143 Electrex part is known to be a quality piece but if you have to replace the RR, consider a recycled Honda RR. There are several threads concerning this. If you were a regular I'd make you look for them yourself but since you're new I'll make it easy:

http://www.thegsresources.com/_forum/viewtopic.php?t=24552&highlight=honda+rr
http://www.thegsresources.com/_forum/viewtopic.php?t=155&highlight=honda

Michael
 
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