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TOPIC: Re:Battery question, opinions wanted.. Forum Tools Post New Topic Show latest posts Rules

#601157 RussB (User) Fresh Boarder Posts: 96 Battery question, opinions wanted.. 4 Years, 11 Months ago   Finally got my bike on the lift today to get it all set for the year. I let the battery trickle charge for about 4 hours, hit the starter button and it turned over a little slower than normal but still fired up. I got checking with my DVM and had 12.70 at the battery, but would drop to 10.65 when cranking. I checked it at the relay and starter and both were 12.60 while cranking. I did clean all the connections and even the ground wire while it was charging. The batter is only 2 years old but I'm curious if it needs replacing already or is that voltage considered normal? Thanks, RussB   Logged     The administrator has disabled public write access. #601178 blue_star (User) Platinum Boarder Posts: 6570 Re:Battery question, opinions wanted.. 4 Years, 11 Months ago   12.7 is about normal voltage for a 12 volt battery with the motor not running. If you only have 12.7 volts when running, your charging system may be bad.   Logged       The administrator has disabled public write access. #601179 jd750ace (User) Front toward enemy Platinum Boarder Posts: 18763 Re:Battery question, opinions wanted.. 4 Years, 11 Months ago   Russ, has your battery sat for a substantial period without being charged, and you just tried to top it up?   Logged       The administrator has disabled public write access. #601217 RussB (User) Fresh Boarder Posts: 96 Re:Battery question, opinions wanted.. 4 Years, 11 Months ago   when I put the bike up for the winter, I trickle charge the battery for 6-8 hours. When I un cover it in the spring, I charge the battery again before ever cranking it. While running, it will charge around 13.9-14.1... My concern is that while cranking, it is around 10.6 volts and cranking a little slow. I always thought it should be above 11.0 while cranking.. RussB   Logged     The administrator has disabled public write access. #601218 Curt (Moderator) Never to old to ride! Moderator Posts: 22378 Re:Battery question, opinions wanted.. 4 Years, 11 Months ago   Get yourself a set of Erbmans wires, a warrior starter relay and it will turn over much better. A good 310 cca battery and a warrior started will top the system of. I made all those changes on my 05 and it doesn't turn but one rev before it starts.   Logged       The administrator has disabled public write access. #601220 davej (User) Platinum Boarder Posts: 18167 Re:Battery question, opinions wanted.. 4 Years, 11 Months ago   I would do the test over making sure the your DVOM is working and is connected properly. Your #'s don't make sense. If you only have 10.65 while cranking it would be impossible to have 12.60 at the relay & starter while cranking. If anything voltage at the relay and starter would be a tad lower due to a voltage drop thru the connections.   Logged     dave   The administrator has disabled public write access. #601284 jd750ace (User) Front toward enemy Platinum Boarder Posts: 18763 Re:Battery question, opinions wanted.. 4 Years, 11 Months ago   Regardless of your meter readings, if your battery sits in a constant state of discharge (which it is when it's not being charged)for a couple of months it diminishes it's capacity. That's why I keep battery tender pigtails on all the batteries, and just move the charger every two days from bike to bike to lawn mower, to car, etc. I make sure and get my money's worth out of the thing. Nothing in the garage goes more than 7 days without the tender hitting it overnight.   Logged       The administrator has disabled public write access. #601294 Ricohoc (User) I am a man of peace, but I adore a riot! Platinum Boarder Posts: 6133 Re:Battery question, opinions wanted.. 4 Years, 11 Months ago   jd750ace wrote: Regardless of your meter readings, if your battery sits in a constant state of discharge (which it is when it's not being charged)for a couple of months it diminishes it's capacity. That's why I keep battery tender pigtails on all the batteries, and just move the charger every two days from bike to bike to lawn mower, to car, etc. I make sure and get my money's worth out of the thing. Nothing in the garage goes more than 7 days without the tender hitting it overnight. Thanks for this info, JD! Reinforces closely to what I have been doing.   Logged       The administrator has disabled public write access. #601518 RussB (User) Fresh Boarder Posts: 96 Re:Battery question, opinions wanted.. 4 Years, 11 Months ago   davej wrote: I would do the test over making sure the your DVOM is working and is connected properly. Your #'s don't make sense. If you only have 10.65 while cranking it would be impossible to have 12.60 at the relay & starter while cranking. If anything voltage at the relay and starter would be a tad lower due to a voltage drop thru the connections. Guess I didn't explain myself the right way. I have 12.7 with the key on but NOT cranking it over. i checked it again today, WHILE cranking, the battery is 10.70, the wire at the starter lug is 10.65. I'm not losing much through the circuit, but I think the battery is just not up to par. What are you people getting at the battery and starter while cranking it over? i will probably just swap out the battery anyhow, when in doubt, change it.... RussB   Logged     The administrator has disabled public write access. #601529 Motorcycler (User) Fresh Boarder Posts: 72 Re:Battery question, opinions wanted.. 4 Years, 11 Months ago   Quick check, in my shop >40 degrees, 13+ key off, 12.7 key On, 12.3 grinding...at battery posts.... Time fer a new battery Russ...   Logged     The administrator has disabled public write access.

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