Battery won't charge

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T-man
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Joined: Thu Jul 13, 2017 3:48 pm
Region or State: North-Holland
Motorcycles Owned Currently: 1992, Yamaha XJ600S Diversion
Location: Netherlands

Battery won't charge

Post by T-man » Thu Jul 13, 2017 4:29 pm

Hi everyone,

My name is Thom and I am currently a Bachelor student in Hospitality management.
I always wanted a motorbike when I rode my 50 CC Gilera GSM moped. Well... When I got the opportunity to obtain my license I got it a.s.a.p. After riding for 4 years now, I never faced major problems. However, now i have an annoying electrical problem....
My battery won't charge and my Multi- meter tells me that (with a running engine and head lights on) that it gets 12,45 Volts, without head lights and a running engine 13,06... I try to check my rectifier but bought a new one anyway. Sadly, I haven't found the problem yet. Ohh I haven't checked the wires that come out of the stator... Furthermore I often read that it could also be as simple as ground wire... Hoe much volt sholud I get from the regulator/rectifier? And how much from the stator/dynamo?
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you have to start somewhere...

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Kadettgek
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Motorcycles Owned Currently: 1990 Yamaha xj600

Re: Battery won't charge

Post by Kadettgek » Sat Jul 15, 2017 9:04 am

Why did you measure the charging voltage? is your battery running low on power?
Is your bike idling when you measure the voltage? It should be charging at a higher RPM rate. try 3000rpm

There is a loose groundwire in your picture.... try and connect that one up.

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T-man
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Motorcycles Owned Currently: 1992, Yamaha XJ600S Diversion
Location: Netherlands

Re: Battery won't charge

Post by T-man » Tue Jul 25, 2017 5:05 am

@kadettgek
I measured the charging voltage since then I could check if my rectifier is working properly. I found out that I had to clean the backside of the rectifier to make it work again having 13.8 V by 4000 rpm. However I didn't had the time to ride the bike, so I had to leave it for 9 days and now I only had 10,4 volts left when I wanted to start it today. Therefore, I measured if electricity was leaking (lekstroom in Dutch) and the reading stated there wasn't any electricity leaking. I think it is rather strange that my battery loses power after 9 days of standing still. Could this mean that the battery is ready to be changed? Or something else?
Thanks in advance!
you have to start somewhere...

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Scorpyn
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Re: Battery won't charge

Post by Scorpyn » Tue Jul 25, 2017 6:04 am

Your battery is probably due a change if it's losing charge that quickly. If nothing else was wrong before, don't change anything else now, just the battery.
If you can't hear me coming from a mile away, I've run out of gas

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T-man
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Posts: 3
Joined: Thu Jul 13, 2017 3:48 pm
Region or State: North-Holland
Motorcycles Owned Currently: 1992, Yamaha XJ600S Diversion
Location: Netherlands

Re: Battery won't charge

Post by T-man » Thu Aug 03, 2017 3:38 am

@Scorpyn. Thanks for the reply! Well the strange thing is that I recharged the battery using an external battery charger and put the battery on my table. Then the battery didn't lose power. However, when I connect the battery to the motorcycle it lost almost 1 Volt per day... So I think my bike draws power from the battery when the bike is off/not used. Do you might know how/why the bike draws power? I don't have an alarm or something that is on....
you have to start somewhere...

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