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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Photo by Igor Djokovic, camping above San Juan river, Arizona USA

I haven't been everywhere...
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Photo by Igor Djokovic,
camping above San Juan river,
Arizona USA



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  #1  
Old 4 Jul 2017
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Electrical / Charging woes

Hey folks, my 1999 XT600E is giving me grief with the electrics and charging. First the battery drains; it charges well on the wall charger but in just one or two short rides it drains again. I took it to the shop fully charged for testing under load and it was dropping to 8v.

The regulator / recitifier seems to be working ... in the garage anyway! A new battery gives me 12.7v, at idle around 13.8v and at revs 14.2v.

1) I noticed however that revs do not brighten the headlamp!
2) During the last night ride I noticed that when switching-off from bright gives me only the side lamp .... but flicking on & off the bright switch again gives me the normal lights
3) The new battery does not drain overnight when parked ... so can I assume no current leaks?
4) What is my next step? Pulling the stator and check for resistance? Anything else?

Thanks in advance for any help!

Regards,
Chris
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  #2  
Old 4 Jul 2017
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Sounds like Stator

Hi Chris

A mate of mine has just had similar problems with his Triumph charging (but no symptom of light switch issue you describe).

Checked all connections etc and also fitted a new battery which kept charge for a few days then died.

Turned out it was a fried stator so that's what I would check next on your XT


Good luck

Steve
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  #3  
Old 4 Jul 2017
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no need to dismount the stator for a check, just unplug it, check that resistance between the three spade connectors, should be about 1 ohm and that none of them is grounding.
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Old 4 Jul 2017
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Run a ground wire from the battery neg. post to one of the reg/rect. mounting bolts to verify it's still grounded good . I mounted mine on the airbox intake when I build my E-start bike and the bike would only run till the battery hit the shut-down voltage for the TCI . It showed charging voltage but due to no grounding of the reg/rect. wouldn't go into the battery .

I'd think if the stator was bad it wouldn't show normal volts at idle and then higher volts when rev'd plus be right in spec. I'd guess somethings going on with the light/light switch or wiring shorting out when running and draining the battery.
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Old 5 Jul 2017
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Thanks to All for taking the time to reply, will check on the pointers you gave me. Regarding the stator, if it turns out to be the culprit, would a rewind be worth the time and money? Or is best to buy a new one? In that case, are there any aftermarket ones better than OEM?
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  #6  
Old 5 Jul 2017
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My mate bought a pattern one and hasn't had any problems since fitted 3 months ago. It was roughly half the price of OEM as well. Here is the link for the company he used

Electrex World Ltd | Electrex World Ltd

Cheers
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