Cranking Battery Voltage - SV650.org

30-04-15, 07:52 AM

Hi Guys

Been having trouble with starting my 02 curvy,

the battery was fully charged using a trickle charger and started fine, wait a few hours and the engine is turning over but not starting and eventually the battery dies.

the battery voltage is around 11.8V with the bike off, as soon as i try to start the bike this drops down to around 4ish volts, letting off the start button the battery jumps back up to 11.8V.

Does this indicate a knackered battery or should i check something else?

Thanks guys

ophic · 30-04-15, 08:45 AM

No load voltage should be 13-odd volts, so I'd say it's time for a new one. How old is it? Has it been fully discharged many times or left in a discharged state for a long period?

30-04-15, 08:50 AM

Not too sure on the age of the battery, it was on when i brought it.

The bike was left stood with no charger for around 4 or 5 months before i brought it. the battery was completely flat, not even trying to turn over at this point, i charged it and left it on charge using an optimate and all seemed to be ok, i have been using it for the last 1-2 months.

last week i used it at night, the next morning wouldn't start. its been charged and started but after a few hours nothing.

Geodude · 30-04-15, 08:59 AM

If you've got or can borrow a multimeter follow the link in my sig, its so easy to follow even i can do it

30-04-15, 07:52 AM	#1
kieron_67 Guest Posts: n/a	Cranking Battery Voltage Hi Guys Been having trouble with starting my 02 curvy, the battery was fully charged using a trickle charger and started fine, wait a few hours and the engine is turning over but not starting and eventually the battery dies. the battery voltage is around 11.8V with the bike off, as soon as i try to start the bike this drops down to around 4ish volts, letting off the start button the battery jumps back up to 11.8V. Does this indicate a knackered battery or should i check something else? Thanks guys

30-04-15, 08:45 AM	#2
ophic Member Mega Poster Join Date: Jan 2004 Location: Whyteleafe Posts: 3,395	Re: Cranking Battery Voltage No load voltage should be 13-odd volts, so I'd say it's time for a new one. How old is it? Has it been fully discharged many times or left in a discharged state for a long period? __________________ Silver SV650SK3, Fuel exhaust

30-04-15, 08:50 AM	#3
kieron_67 Guest Posts: n/a	Re: Cranking Battery Voltage Not too sure on the age of the battery, it was on when i brought it. The bike was left stood with no charger for around 4 or 5 months before i brought it. the battery was completely flat, not even trying to turn over at this point, i charged it and left it on charge using an optimate and all seemed to be ok, i have been using it for the last 1-2 months. last week i used it at night, the next morning wouldn't start. its been charged and started but after a few hours nothing.

30-04-15, 08:59 AM	#4
Geodude Member Mega Poster Join Date: Jun 2009 Location: Durham Posts: 2,669	Re: Cranking Battery Voltage If you've got or can borrow a multimeter follow the link in my sig, its so easy to follow even i can do it __________________ Black naked 1999 sv650 which im trying to keep happy Custom paintwork *Saragon Customs* Spray painting *Electrical fault finding guide* and *Regulator rectifier test* Only a biker knows why a dog sticks his head out of a car window.

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