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li54sa

idle voltage at 13.5 v

7 posts in this topic

hey guys.two days ago i change the battery on my wr450 2003.i decided to take some information about the voltage.on idle the bike produce 13.5 volt and when i raise the rpm to 5000 as manual writes it drops to 13.3 volts but it charges a bit slow.is that normal?when the bike is not working the battery is about 12.6-12.7 volt.d you think that the stator or  regulator have any problem?thanks a lot..

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It's a little low, as you should be able to get 13.7 to 14.0, but there are lots of variables, like a cold battery.

Charging won't occur untill you are over 4000 rpm, and is very slow.

Just try it and see.

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at 4000 rpm it shows 13.3-13.4 volt.at idle it shows 13.7-13.8.

Right, because, it is drawing current to charge the battery......

Spinning the motor faster does not create higher voltage.....that's what the regulator is for.

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yeah i know that but the manual writes that at 5000 rpm it should produce 14.1-14.9 volt instead of mine that produces 13.3-13.4 volt.is it normal? 

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yeah i know that but the manual writes that at 5000 rpm it should produce 14.1-14.9 volt instead of mine that produces 13.3-13.4 volt.is it normal? 

 

If your measuring off of the battery you probably wont show too much. The battery acts as a buffer and takes a while to go to a higher voltage. Just ride it if it stays charged it's good.

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yeah i know that but the manual writes that at 5000 rpm it should produce 14.1-14.9 volt instead of mine that produces 13.3-13.4 volt.is it normal?

The manual is correct , you have crap for voltage. you can easily lose a full volt through the various connectors from the stator to the RR , to the battery by having any resistance in those connectors.

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