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Does the kick start have anything to do with the battery?

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GREENI3
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PostPosted: 21:50 - 29 Mar 2011    Post subject: Does the kick start have anything to do with the battery? Reply with quote

Well I've been having a few problems recently starting the bike up.

Took about 10 kicks to start today and whilst I was doing this the battery was reading at about 4.5v!

After going for a ride, I turned the engine off for about half an hour, kick started it again and it only needed 1 kick this time and the battery was reading about 7.5v.

I know the batterys probably knackered, as I checked my mates battery and it read 12.56v compared to 7v on mine.

Since the battery has been playing up I've also noticed that it's taking a lot longer to accelerate up to speed, so I'm wondering whether this has anything to do with the power in the battery.

So would buying a new battery make it any better?
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-Savage-
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PostPosted: 21:54 - 29 Mar 2011    Post subject: Reply with quote

Really sounds like your battery is undercharged. If you an get a lend of/ buy a battery charger and charge the battery full. You should notice a fair difference. Is there any reason you are kicking it instead of using the button? Does it not have an electric start? Is the battery too dead to turn the starter?

First course is to get a charged battery into it, and see if that sorts out your problems. If it does, then you should be wondering if it was just a knackered battery, or if your charging system is tits up. If you charge your current battery full, and then it de-charges it could be both, but if you buy a new battery and it de-charges then it's prob your charging system giving you bother.

What is the voltage when the bike is running?
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Last edited by -Savage- on 21:56 - 29 Mar 2011; edited 1 time in total
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prawny1
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PostPosted: 21:56 - 29 Mar 2011    Post subject: Reply with quote

No the kcik start has nothing to do with the battery it is powered by your leg Laughing

your starting issue depends on whether your ignition is a/c (powered from stator) or d/c (powered by battery)

An a/c ignition will spark just as well with a flat battery but a d/c system will have a weak spark/no spark if the battery is too weak.
I know my bike is d/c so can be a bihatch to start if the battery is not 100%.
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Last edited by prawny1 on 22:03 - 29 Mar 2011; edited 1 time in total
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Howling TerrorOutOfOffice
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PostPosted: 21:59 - 29 Mar 2011    Post subject: Reply with quote

Word to the wise.

https://www.bikechatforums.com/viewtopic.php?p=2810287&highlight=#2810287

https://www.bikechatforums.com/viewtopic.php?p=2810422&highlight=#2810422

So we don't have to go over the same ground....again.
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-Savage-
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PostPosted: 22:01 - 29 Mar 2011    Post subject: Reply with quote

Howling Terror wrote:


Crap. I think I done gone been trolled lol.
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GREENI3
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PostPosted: 22:11 - 29 Mar 2011    Post subject: Reply with quote

Ok, sorry if I'm reposting, but I ask questions on the other 2 and don't seem to get a reply back. Crying or Very sad

I just want to be 100% sure about it before spending 20 quid on a new battery.

The battery does seem to lose charge (about 1v in a day)

Does it mean the battery can't be revived even if I charged it up?

I'd be using a trickle charger, so need to know if it'll work.

And again, apologies for the repost
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Kickstart
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PostPosted: 22:27 - 29 Mar 2011    Post subject: Reply with quote

WiiLKO wrote:

The battery does seem to lose charge (about 1v in a day)

Does it mean the battery can't be revived even if I charged it up?


Almost certainly it can't be revived if the voltage is that low. The voltage is not the change, but is slightly affected by the level of charge. Hence a fully charged 12V battery is a bit over 12V, but when absolutely knackered it is just a bit under 12V.

Best way I can explain it would be like the seat height on a bike. Bike might have a 30" seat height and with a heavy rider sitting on it it might drop to 26" as the suspension compresses, and when they get off it will go back up to 30". If an elephant sits on the seat and crushes the bike down 15" it won't recover back to its full height when the elephant gets off it.

All the best

Keith
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GREENI3
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PostPosted: 22:34 - 29 Mar 2011    Post subject: Reply with quote

Kickstart wrote:
Almost certainly it can't be revived if the voltage is that low. The voltage is not the change, but is slightly affected by the level of charge. Hence a fully charged 12V battery is a bit over 12V, but when absolutely knackered it is just a bit under 12V.

Best way I can explain it would be like the seat height on a bike. Bike might have a 30" seat height and with a heavy rider sitting on it it might drop to 26" as the suspension compresses, and when they get off it will go back up to 30". If an elephant sits on the seat and crushes the bike down 15" it won't recover back to its full height when the elephant gets off it.

All the best

Keith
So basically what you're saying is, is that the battery is completely f*****d (won't even be able to charge it up) and I am in need of a new battery?

Thanks for your help Keith Thumbs Up
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Kickstart
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PostPosted: 22:54 - 29 Mar 2011    Post subject: Reply with quote

Hi

Yes. There is a tiny chance it could be recovered, but really really tiny.

I have had really dead batteries still manage about 10V. And at that they were no use beyond scrap value.

All the best

Keith
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stirlinggaz
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PostPosted: 02:16 - 30 Mar 2011    Post subject: Reply with quote

still think its worth buying a good charger seeing as you might have to buy a charger anyway before you fit your new battery.
the one i have (dont know what it costs as it was an xmas pressie last year) in the booklet there are claims to recover deeply discharged & sulphated batteries.
there are a couple of chargers that claim to recover batteries as low as 4v!
i tested it out when i got it by trying to charge up the umpteen knackered batteries i had in the shed (about 6 or7) that were all below 10v, some as low as 5v! i had tried charging them up in the past but the trickle charger wouldnt do it. (btw, i remember buying a battery & getting a free trickle charger with it, some place on ebay. but you can get them for around a fiver from lidl/aldi) neither would the cheap car charger i have had for years.

iirc, it charged 3 no problem (standard 9amp that fit into various 125's) but took longer than i thought it would, like 18/20hours, iirc.

a couple had to be topped up with distilled water as they were years old & were half empty.& they lit up the "battery dead" function light on the charger though, 1 of them right away, the other after a few hours.

1 or 2 took ages (like all day & night, 10/12 amp though, so bigger batteries) to charge up fully.

& out of all the ones that claimed to be fully charged, only one wouldnt really hold a charge. 1 of the half dry ones. it had black bits floating in the liquid & kept dropping to 9 or 10v after a days riding.

so i ended up rescuing half a dozen batteries that no other charger would rescue, so if i had bought the charger, it would have paid for itself right away.
i have it bolted to the wall on my shed (garage doesnt have mains leccy) & came with the cables to connect it to 2 bikes permanately.
handy piece of kit.... worth thinking about, especially as it will tell you if your battery is indeed dead.

come to think about it, argos sell a charger which has the same function though not as good, well judging by the quick test i had of it. Wink . so you can buy it, try it & if it doesnt charge the battery up (lighting up the "battery dead" red light) you can take it back under the 16 day refund policy & go buy a new battery & cheap trickle charger!!!
EDIT : i just had a look on ebay & you might not want to spend the 60 quid Shocked it costs for the charger i have, lol. its the accumen platinum duo. but thinking back, knowing what i know now, i would certainly have splashed out on this (or similar charger) if i was in your situation or still had a few "dead" batteries.

cheers,
GAZ
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Teflon-Mike
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PostPosted: 02:59 - 30 Mar 2011    Post subject: Reply with quote

WiiLKO wrote:
Kickstart wrote:
Almost certainly it can't be revived if the voltage is that low. The voltage is not the change, but is slightly affected by the level of charge. Hence a fully charged 12V battery is a bit over 12V, but when absolutely knackered it is just a bit under 12V.

Best way I can explain it would be like the seat height on a bike. Bike might have a 30" seat height and with a heavy rider sitting on it it might drop to 26" as the suspension compresses, and when they get off it will go back up to 30". If an elephant sits on the seat and crushes the bike down 15" it won't recover back to its full height when the elephant gets off it.

All the best

Keith
So basically what you're saying is, is that the battery is completely f*****d (won't even be able to charge it up) and I am in need of a new battery?

Thanks for your help Keith Thumbs Up


Either that, or explaining why my bike's suspension was donald ducked after taking my ex wife pillion!
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GREENI3
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PostPosted: 19:53 - 30 Mar 2011    Post subject: Reply with quote

Right, I bought a new battery last night, so hopefully that'll sort it out.

Thanks for your advice again everyone, much appreciated Thumbs Up
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