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Old 11-19-2012, 05:21 PM   #1
sobrider OP
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KTM 400 EXC Stator, Enough?

I have a 2006 KTM EXC Racing model. The specifications say the alternator puts out 150 A and the wiring diagram shows this on two circuits, one AC supplying the lighting and the other DC, supplying the starter, battery and fan (if present)....OK, this has been discussed, ad infinitum. But, the question is, why is the Trailtech upgrade to a 100 W stator better able to supply both circuits (now both supplied with DC power) rather than keeping the stock stator and converting it to all DC power? If the stock stator is re-wired and converted to all DC, will it still put out 150 W as it is rated now, or is some power lost in the conversion? Thanks.....
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Old 11-19-2012, 05:41 PM   #2
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The answers that you seek
http://www.spokanister.net/ktm_stator.htm
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Old 11-20-2012, 01:19 AM   #3
LukasM
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The stock one doesn't put out 150W, more like 80-100 depending on RPMs. The TT is rated at 100W at idle and goes up slightly.

Biggest benefit with the TT is the improved reliability and that you don't have to DIY. But if you have an 06 where the stock stator is already better than the older ones, and you don't mind modding the stocker, go for it.

You can still use a TT flywheel with either stator for an extra 20W or so, it has stronger magnets. Different weights available so you can tune the engine characteristics a bit to your liking.
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Old 11-20-2012, 01:40 AM   #4
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Quote:
Originally Posted by LukasM View Post
The stock one doesn't put out 150W, more like 80-100 depending on RPMs.
Yep, that is all I've been reading in these posts, but....The spec page from KTM Owners Manual for my 2006 says "150W". Is anyone aware of an increase in power in the stock rotor? Or, how can I measure the output, keeping in mind that I am not an EE?
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Old 11-20-2012, 01:50 AM   #5
LukasM
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It doesn't have 150W, regardless of what the manual says. There was no increase over the years either.

You can measure current with an ammeter clamp.
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Old 11-20-2012, 06:02 PM   #6
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Thanks for the posts. If it's one thing I keep learning, it's "don't believe everything you read" even if it is in the manual. Im going with the TT plug and play, too much down time already!
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