Battery Charging Test

12 volt charging systems in autos and motorcycles are pretty much the same. In terms of voltages, you will see about 12.8v with the vehicle off and about 14.4v with the vehicle on. Anything above 14.8 can fry your battery and you should look at your regulator or regulator/rectifier. These are the magic numbers when it comes to charging systems.

Category:

Autos & Vehicles

Tags:

• mototcycle
• buell
• harley davidson
• yamaha
• battery
• charging
• alternator
• stator
• eviljesus

[unit666industries]

what type of issues does your freind is/was having?

[EvilJesus909]

@unit666industries It was a while back, but if I remember correctly, his battery was not charging correctly.

[flipmode00]

i have a problem i bought a YT9B-BS its from Yuasa last year in may 2010 and now its not holding its charge anymore at all the volts only shows 11.34. I thought they were suppose to be one of the best? what can I do tired of paying $113 and wont last me 3 year???

[EvilJesus909]

@flipmode00 You could have gotten a defective battery, but if you really want to test it, you should take the battery to a test center and have them run a load test on it. If the battery proves to be good, then it will be something with your charging system (read: stator)...good luck.

[LiquidChem]

car batteries should be at about 14 volts when fully charged, no?

[EvilJesus909]

@LiquidChem sorry for the late reply everyone, I've been super busy (getting another video ready to upload though). To answer your question, no, all vehicles run on a 12 volt system (if you look at your batteries sticker, it will be rated at 12 volts).

[JimmySpangle]

Ye Gods. Peter Andre has let himself go hasn't he?

[flipmode00]

@EvilJesus909 tks i went today and apparently the rectifier is done and the stator need to be changed also, what gets me mad is that suzuki posted a recall on the 08 and up for the rectifier but not the 06-07. and this afternoon while riding you can smell something burning where the rectifier is.

[EvilJesus909]

@LiquidChem No, the standard voltage of most (and I say most because I have not seen/tested ALL vehicles), is 12 volts (if you look at your wiring diagrams, you will see that you are running a 12v system. Also, look at the actual output of your battery, more than likely it will say it is a 12v battery. The misconception comes in because a 12v battery requires 13+ volts to charge (you will measure this when the engine is running).

[EvilJesus909]

@Michiganborn1969 Thank you very much. I'm glad this information is helping fellow riders. I will try my best to answer questions sent to me, so here it goes. Yes the information is going to be the same, readings might be off a little (varies some by vehicle). If you are having issues like that, I would definitly try testing the output power from the stater and from the voltage regulator/rectifier. I would definitely start with idle speed (even if you just had the carb rebuilt). Good luck!