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Good morning all,

I recently purchased a second hand 420 and the battery wasn't charging. I took apart some of the connectors (apologies i'm not a wiz kid when it comes to mechanics) around the battery and sprayed them with wd40 as they were filthy and then re-connected. This solved the battery issue and it is now charging.

The quad has been running perfectly for about a month. I purchased some heated grips and accidentally forgot to turn them off one night and this completely drained the battery. I charged her up, however, although the battery is still charging itself, after 3 or 4 uses it is nearly completely flat again and I have to use the pull start.

Can anyone advise why this may be? According to the chap I bought the quad from, the battery was replaced shortly before me purchasing it.

I really appreciate anyone's thoughts on this or if anyone has had similar issues.

Many thanks
Chris
 

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I'd have the battery load tested. You can get this done at autozone or other parts place.. with dirty connections and the battery not charging properly and then leaving the heated grips on could have damaged the battery. And there's the possibility of just having a bad battery from the get go...

Have it checked and let us know what the findings are. Then go from there.. Tons of great folks on here that will be able to help...

Welcome to the forums!!


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Do you have a good quality multimeter? With the bike running and with the throttle at about half, tell us what the DC and just as importantly, what the AC voltage measurements are with the meter connected to the battery posts.

Rick

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other than what was said ^^^ , any chance the heated grips are not turning off ????.
 

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even a new battery if run dead dead, can ruin its cells and NEVER again recover
if you have a volt meter
charge to full charge, and test and see what its at volt wise
wait a few hrs and test again and see if its dropping on you

same can be said, on HOW you re charged the battery, some require LOW amp re charge and if you DODN"T do so, you could have cooked the cells in the battery , thus ruining it

having load tested will answer this too, and best bet!
 

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even a new battery if run dead dead, can ruin its cells and NEVER again recover
if you have a volt meter
charge to full charge, and test and see what its at volt wise
wait a few hrs and test again and see if its dropping on you

same can be said, on HOW you re charged the battery, some require LOW amp re charge and if you DODN"T do so, you could have cooked the cells in the battery , thus ruining it

having load tested will answer this too, and best bet!


Just got back from warrantying a battery I bought about 3 weeks ago all was good had it in the shop put it on trickle, click click click, take all cables apart to clean to find out yes the battery won't load test. Shows 13v prior to test, this was not the cheap battery either, I spent the money on ultra. Thanks for warranties, funny thing is there was nothing wrong with the old one I was just being proactive.


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