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  #1  
Old 26-06-2006
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Lindo Lindo is offline
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Flat battery on WR450

Hi Guys,

I took my newly acquired 04 wr450 for it's first serious ride on the w/e.

It was a 3 hour ride. After the first 1.5 hrs I had used the electric start probably 15 times. Soon after the battery went flat. It was a new battery.

I didn't expect this to happen. Is this normal? I would have thought the battery would recharge whilst riding.

Any advice would be appreciated.
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Old 26-06-2006
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Munchkin Munchkin is offline
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a "new" battery does need to be fully charged before being used. Did you put the "new" battery on a charger b4 using it???

The battery should charge during riding but just depends on how much you were draining it.

You could also just be unlucky and have gotten a dud battery???

I would charge it for 24hrs before next ride and then see how it goes!
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Old 27-06-2006
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and check if its charging the battery
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Old 27-06-2006
EdwardBennet EdwardBennet is offline
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Quote:
Originally Posted by Lindo
Hi Guys,

I took my newly acquired 04 wr450 for it's first serious ride on the w/e.

It was a 3 hour ride. After the first 1.5 hrs I had used the electric start probably 15 times. Soon after the battery went flat. It was a new battery.

I didn't expect this to happen. Is this normal? I would have thought the battery would recharge whilst riding.

Any advice would be appreciated.

You have to drive a car 11km to charge the battery so granted the WR battery is nowhere as big as a car battery I'd say that this is normal in that you cranked over the engine 15 times in obviously short spaces.
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Old 27-06-2006
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Looks450 Looks450 is offline
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I find if i am having trouble on hills that i can drain my battery in under an hour. I have also found that if i leave my key on for a couple of hours it will start to drain the battery to the point of only getting about three starts out of it.

Here is the trick i found.

Take the battery out and connect a hallogen headlight globe to it and drain it completly over night. I then hook up the lowest amp charger i can find to it and recharge it over a day or two. This brings back a strong powerful battery that performs like a brand new one.

Cheers
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Old 28-06-2006
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thanks for the tip Looks450.

Yes, I would say I have simply used the battery too many times in a short period from the looks of it.

I have a battery recharger that has a switch for 6 or 12v and a switch for 'trickle'. The 6v trickle charge would be the best for these sort of batteries, yes / no?
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Old 28-06-2006
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wiGGy wiGGy is offline
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The battery in a WR would be 12V, so the 6V trickle charge is no good. Use the 12V setting.
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Old 28-06-2006
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cheers Wiggy....
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  #9  
Old 28-06-2006
EdwardBennet EdwardBennet is offline
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Quote:
Take the battery out and connect a hallogen headlight globe to it and drain it completly over night. I then hook up the lowest amp charger i can find to it and recharge it over a day or two. This brings back a strong powerful battery that performs like a brand new one.
To save buying a globe. Put a piece of copper wire or fencing wire across the battery terminals. much quicker.
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  #10  
Old 28-06-2006
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ScottWRF450 ScottWRF450 is offline
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These batteries are jell cell and don't like to be drained and recharge quickly like a normal wet lead acid.

I have found that for the first few rides I tighten the battery terminals as they do work loose with vibration. Also use the key to turn off at every stop does extend the battery useful time. The key obviously keeps one part of the ignition circuit live, so will drain the battery while not running.

Trickle charging a dead flat battery - for 24hrs - will reduce calcification on the paltes as opposed to a very quick charge. So this will make the battery last longer overall.

Test the charge circuit while running just above idle. A good charge voltage should be around 14.2V (DC).

If not taker her back!
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