|Posted on Saturday, March 12, 2011 - 11:07 am: ||
My bike has been standing at the dealers cold basement for 3 months and when i got it back the battery was dead. So we charged it overnight and i did the first cruising of the season for 2 hours. The following morning the battery was dead again. I suspected the battery had collapsed and bought a new battery. The new battery was flat when i put it on the bike so i started the bike with my car battery and went for a long ride. After 1 hour of solid driving i stopped and the bike wouldn't start again.
When i put the battery on the tender it was 50% charged, even after 1 our of solid driving on a brand new battery (that was flat when i received it from the dealer).
Idle voltage: 11.7
Driving voltage: 13-14
Whats wrong here? Is the battery bad or was it never fully charged or is it the stator?
How can i tell?
|Posted on Saturday, March 12, 2011 - 04:07 pm: ||
If your seeing 13-14 volts while your riding, the stator is working.
Sounds like the VR is good also.
I would suspect the "new" battery you purchased that was "flat".
|Posted on Saturday, March 12, 2011 - 06:02 pm: ||
Wouldn't a 1 hour drive cure that?!
|Posted on Saturday, March 12, 2011 - 06:20 pm: ||
Not even close. The stator puts out 37 amps at peak output, which is high up in the power band. At highway speed (60mph), you would still be turning the motor at only 4000rpm. I don't have the figures on power output vs RPM, but it is much lower than the 37 amp peak. Lets say you are putting out 25 amps, you still need to run the 55w headlight bulb, thats 4.5 amps right there. Position light, tail light, ECM, fuel injectors, will probably suck up another 5 amps. That also assumes your fans never turn on, which probably draw at least several amps each. If you do the math (assuming my numbers are right), you don't have many amps free. It would in a sense be like charging it with a trickle charger. Lets not forget that if you have the stator harness added, you will lose 1/3 of your total output when it disables a stator leg. This all assumes you stayed on the highway, and didn't come to a stop or some other situation where your engine RPM was reduced.
Tl;dr, bike does not have enough power to charge a dead battery.
Edit: The more I think about it, the more I think I am underestimating the output of the charging system during cruise. I'll attach a multimeter to it one day and see for sure.
(Message edited by froggy on March 12, 2011)
|Posted on Saturday, March 12, 2011 - 06:36 pm: ||
Oh thanx guys! Will monitor the batterys health closely tomorrow.
|Posted on Monday, March 14, 2011 - 05:29 pm: ||
From what you said, the replacement battery is also a dud!
It should have been fully charged and able to spin the engine when installed. A good battery would have picked up enough charge with in the hour for a restart.