Honda CBR 125 wont accept any Batteries

[Nyilka]

Hi , i am having some problems with my bike.

I have a 2005 honda CBR 125 , it had a very crapy battery in it Last summer witch worked pretty good but in september after a charge it had swollen so i got a Varta battery from a friend and later i found out that the battery doenst hold any electricity . I got some spare money and i bought a Good battery From a friend who doesnt use his bike anymore . The battery was used a month , after sat for 2-3 weeks and got charged up. The Battery after instalation worked great after jumping it with another battery . Started very good. Went for a 4-5 hour ride , and after that i went home . yesterday I tried to start up My bike and Nothing Came up on the dash at all . After a push start on the dash only the speedo worked , and the rpm counter was jumping from 0 to 1.8k which is the idle , and after didnt show anything . So i went home And put the battery to charge and it swollen again so went to the store and bought another battery , After installation i tried to start the bike and yet again nothing happened . Tried To jump it with another battery but it just sparked hella bad. Any tips What Should i do?

I am trying to do it myself because where i live The mecanics Price Starts From 140£ for an oil change and only goes up for anything else.

Thanks.

[xX-Alex-Xx]

So:

Battery 1 = DOA
Battery 2 = DOA
Battery 3 = only worked after a jump (so likely DOA).
Battery 4 = Did you charge it first?

Your problem isn't the bike, you just keep installing dead or uncharged batteries.
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DILLIGAF

[Islander]

[Nyilka]

[Nyilka]

[MCN]

[WD Forte]

No stator testing, no diode testing, no connection checking
No use of a voltmeter
No wonder its fooked

owner inflicted wounds IMO
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bikers smell of wee

[Nyilka]

[Kawasaki Jimbo]

[Nyilka]

[arry]

Checked all the fuses and relays? Did the battery(s) swell whist connected to the bike?

[xX-Alex-Xx]

[Nyilka]

[Nyilka]

[Nyilka]

[Nyilka]

[Robby]

CBR125s use a 6Ah battery as standard, so I'm not surprised you broke them with a 4A charger. Smart battery chargers for bike batteries tend to top out at 0.8A, and can charge at a lower rate than that.

That said, I would still expect a new battery to have enough juice to start the bike without needing a jump start. There could well be more wrong here than the battery.

Personally I would get a smart charger on the battery you have. Green lights good, red lights bad. If you have green lights on the charger and the bike isn't starting, we need to know the symptoms - are the dash lights coming on, is it making a rapid clicking noise, is the engine turning over but just not catching?

If it will start, but the battery is flat the next day, it means you either have something drawing power (like an alarm) and/or the charging system isn't working.

Bike charging system are surprisingly bad in general. The sort of problems that might come up once 100k miles on a car may come up in 10k miles on a bike. Alarms and trackers are also a pain in the arse and easily flatten a battery in a fortnight or less.

[Nyilka]

[Kawasaki Jimbo]

Battery 1 was good until it swelled up after charging in September.
Killed by charger.

Battery 2 from a friend, not clear if it was used and later didn’t hold a charge, or whether it was used to somehow check against Battery 1, and showed Battery 1 wouldn’t hold a charge.
OP seems to charge batteries before use (a good thing if the charger is good) so let’s assume that happened.
Battery killed by charger?

Battery 3 from a friend again, worked for 2-3 weeks until for some reason it was charged. After reinstalling it needed a jump start but wouldn’t start of its own accord next day. Put on charge and it swelled up.
Killed by first charge. Swelled in second charge just to make it obvious.

Battery 4 bought brand new but wouldn’t work after installing.
Was this one charged before use too?
Killed by charger.

Attempts to jump start produced hella bad sparks.
Polarity issues?

New charger, new battery. Or find a local bike shop which will prep a new battery for you.

[MCN]

If you had 'polarity' issues then there is a possibility the diode has been cooked in the charge system.

If you are uncertain, get it to a bike shop.

They 'should' fairly quickly find the fault and let you know.

Your looking at a bill for a couple of hours Labour.
Unless you can negotiate something....

But that might/should be less hassle and expense of fitting multiple batteries.
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Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN.