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WRLuisSa

WR450 dead battery

11 posts in this topic

Hi everyone,

 

I must have forgotten to switch off the ignition last time (one week ago) I rode the bike and the battery went dead since the lights stayed on probably.

I had to kick start the bike to run it but after five minutes I switched it off, but still not enough charge to start the bike with electric start.

 

My bike is a 2013 WR450, it has only 500 miles and the battery never went dead before (always started great first time with electric start).

 

Do you think I need to ride it for a while for it to charge properly?

Do you think the battery is completely dead as in, will I need a new one?

 

 

Thanks

 

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It will need to be run for more than 5 min to charge the battery, that's for sure, or hook it up to a battery charger.

 

Completely draining a battery isn't good for it, but I drained the stock battery on my 2006 WR450 a dozen or more times over the course of 5+ years before it eventually bit the dust so yours should come back after it gets a full charge.

Edited by woods-rider

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It won't start charging till 20+ mph.

 

What makes you say that? I doubt the charging system is connected to the wheel sensor or the trans.

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When the bike is idling, it isn't producing enough electricity to run the bike and charge the battery at the same time.  

Once the engine is at a higher RPM, it turns faster and produces more electricity, thus charging the battery more effectively. 

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When the bike is idling, it isn't producing enough electricity to run the bike and charge the battery at the same time.  

Once the engine is at a higher RPM, it turns faster and produces more electricity, thus charging the battery more effectively. 

 

Right, but RPM has little to do with speed.

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Could I bounce it off the rev limiter in neutral for 10 minutes or so if I don't feel like going 20+ mph?

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Could I bounce it off the rev limiter in neutral for 10 minutes or so if I don't feel like going 20+ mph?

 

My wife does that in the new SUV I got her.  She says it gets the heat going sooner.

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Could I bounce it off the rev limiter in neutral for 10 minutes or so if I don't feel like going 20+ mph?

 

Yeah, if you don't mind boiling over and floating a valve.....

 

Hence, the minimum of 20 mph, a approx speed number to reach the minimum speed required to both charge the battery and not overheat. 

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While troubleshooting my dead regulator/rectifier I was checking the stator to see if it was putting out voltage. At idle I was getting 35 volts ac. At ~5000 rpm it was putting out 79 volts ac. Manual says the regulator/rectifier should put out 14.0 volts dc. I am not an electrical engineer so I have no idea how many volts ac it takes to produce an output from the recg/rect of 14.0 volts dc.

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Hello gents,

 

Just to update, I had to remove the battery from the bike and use a batt charger to charge it properly. Now it is working fine again.

 

I tried to ride the bike for more than 25 minutes and still when I got back home, tried to start it with electric start but no luck.

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