Battery issue - Curvy - SV650.org

JAWs · 22-04-14, 09:01 AM

Help!! I needed to replace the battery on my SV the other week as it didn't seem to be holding a charge (and it had been on there for ages!) so brought a Motobatt. Thursday morning the bike wouldn't fire up and the battery went flat very quickly, started eventually. Charged it yesterday, came out this morning and once again no joy, not a happy bunny to say the least. Luckily I also charged a spare battery I had, I took the new battery out of the bike only to discover it had ballooned (see pictures) any ideas on what would cause this?
Any help much appreciated.

maviczap · 22-04-14, 09:21 AM

The only battery I'd seen do that is the one on Kellyjo's Honda, when the reg rectifier had gone, so the battery was overcharging

22-04-14, 09:34 AM

Thats my thought. Too many volts to the battery. Get a multimeter and check whats actually reaching the battery before you throw a new battery in there, and get that fried as well.

Biker Biggles · 22-04-14, 10:51 AM

Quote:

Originally Posted by JAWs

Help!! I needed to replace the battery on my SV the other week as it didn't seem to be holding a charge (and it had been on there for ages!) so brought a Motobatt. Thursday morning the bike wouldn't fire up and the battery went flat very quickly, started eventually. Charged it yesterday, came out this morning and once again no joy, not a happy bunny to say the least. Luckily I also charged a spare battery I had, I took the new battery out of the bike only to discover it had ballooned (see pictures) any ideas on what would cause this?
Any help much appreciated.

Expensive mistake.To fry one battery is unlucky,but to buy a brand new one and fry that as well is careless

Whatever you do dont put a third battery in it until you have got a proper diagnosis via a multimeter.A quick search on here for "charging system" will give you a good rundown on what to do and the numbers you should see.My guess is that your bike is hugely overcharging the battery,causing it to boil and blow up like that.

timwilky · 22-04-14, 11:40 AM

Firstly I am not criticising the OP, but I do find it strange when the stock response to a "charging issue" is to spend about £50 on a battery when £5 on a mulitmeter will give sufficient diagnostic capacity to identify the root cause of a problem.

I had a friend ask me to look at his van last week. "I have just spent £85 on a new battery, the last one was only a year old and it won't start". £24 on a new starter resolved his problem he is now trying to return the unnecessary battery

JAWs · 22-04-14, 11:48 AM

No excuse really, but in hind sight,yes I should have done some checks but at the time I thought it was an old battery so as I need the bike everyday I'd order a new one!!
It turns out to be a wrong move, will borrow a multimeter from work and take readings across the battery tonight.

Sid Squid · 22-04-14, 04:08 PM

Gross overcharging - the regulator umm - doesn't!

JAWs · 23-04-14, 11:26 AM

OK, did a quick test last night, put the multimeter across the battery and came out with the following -
Ignition off - 13.5v
Bike running - 14v
Revs @ 5K - 14.5v

Am I missing something as everything seems to check out correctly, or do I need to check reading on the regulator?

JAWs · 28-04-14, 12:37 PM

Sorry to be a pain, but do these numbers seem OK or is it the regulator?

28-04-14, 02:26 PM

I have some experience with the regulator as it went on mine, them number do look ok, but that could mean its a heat related issue (Once the R/R is up to high temps) or that there is a dodgy wire in the charging circuit somewhere.

Id suggest retesting while moving connections etc to see if the readings change.

22-04-14, 09:01 AM	#1
JAWs Member Join Date: Mar 2010 Location: Kent Posts: 45	Battery issue - Curvy Help!! I needed to replace the battery on my SV the other week as it didn't seem to be holding a charge (and it had been on there for ages!) so brought a Motobatt. Thursday morning the bike wouldn't fire up and the battery went flat very quickly, started eventually. Charged it yesterday, came out this morning and once again no joy, not a happy bunny to say the least. Luckily I also charged a spare battery I had, I took the new battery out of the bike only to discover it had ballooned (see pictures) any ideas on what would cause this? Any help much appreciated.

22-04-14, 09:21 AM	#2
maviczap Member Mega Poster Join Date: Mar 2007 Posts: 9,096	Re: Battery issue - Curvy The only battery I'd seen do that is the one on Kellyjo's Honda, when the reg rectifier had gone, so the battery was overcharging __________________ We're riding out tonight to case the promised land Make everyday count RIP Reeder - Jolly Green Giant and comedy genius

22-04-14, 09:34 AM	#3
atassiedevil Guest Posts: n/a	Re: Battery issue - Curvy Thats my thought. Too many volts to the battery. Get a multimeter and check whats actually reaching the battery before you throw a new battery in there, and get that fried as well.

22-04-14, 11:40 AM	#5
timwilky Member Mega Poster Join Date: Mar 2004 Location: Not in Yorkshire. (Thank God) Posts: 4,116	Re: Battery issue - Curvy Firstly I am not criticising the OP, but I do find it strange when the stock response to a "charging issue" is to spend about £50 on a battery when £5 on a mulitmeter will give sufficient diagnostic capacity to identify the root cause of a problem. I had a friend ask me to look at his van last week. "I have just spent £85 on a new battery, the last one was only a year old and it won't start". £24 on a new starter resolved his problem he is now trying to return the unnecessary battery __________________ Not Grumpy, opinionated.

22-04-14, 11:48 AM	#6
JAWs Member Join Date: Mar 2010 Location: Kent Posts: 45	Re: Battery issue - Curvy No excuse really, but in hind sight,yes I should have done some checks but at the time I thought it was an old battery so as I need the bike everyday I'd order a new one!! It turns out to be a wrong move, will borrow a multimeter from work and take readings across the battery tonight.

22-04-14, 04:08 PM	#7
Sid Squid No, I don't lend tools. Mega Poster Join Date: Jul 2003 Location: Skunk Works, Nth London Posts: 8,680	Battery issue - Curvy Gross overcharging - the regulator umm - doesn't! __________________ If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing. "a deathless anthem of nuclear-strength romantic angst"

23-04-14, 11:26 AM	#8
JAWs Member Join Date: Mar 2010 Location: Kent Posts: 45	Re: Battery issue - Curvy OK, did a quick test last night, put the multimeter across the battery and came out with the following - Ignition off - 13.5v Bike running - 14v Revs @ 5K - 14.5v Am I missing something as everything seems to check out correctly, or do I need to check reading on the regulator?

28-04-14, 12:37 PM	#9
JAWs Member Join Date: Mar 2010 Location: Kent Posts: 45	Re: Battery issue - Curvy Sorry to be a pain, but do these numbers seem OK or is it the regulator?

28-04-14, 02:26 PM	#10
Corny Gizmo Guest Posts: n/a	Re: Battery issue - Curvy I have some experience with the regulator as it went on mine, them number do look ok, but that could mean its a heat related issue (Once the R/R is up to high temps) or that there is a dodgy wire in the charging circuit somewhere. Id suggest retesting while moving connections etc to see if the readings change.

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