stator replacement / upgrade


8 replies to this topic
  • spidennis

Posted October 27, 2006 - 04:21 AM

#1

Anyone upgrade their stock stator to a higher wattage, convert to a DC lighting system and run more and bigger lights?

It appears that I have to replace my stator (03'WR250F) (got over 17 AC volts at my headlight and keep blowing front and rear ac bulbs) so I've been looking around for a fix ..... HID would be great, but just not in the budget ....... Any recommendations?

E-line stator:
http://www.rickystat...hting_coil.html

TrailTech stator replacement:
http://trailtech.net...r_services.html
http://trailtech.net...-YFZ450-01.html

Baja Designs:
https://www.bajadesi...2.aspx?content=

AC voltage regulator:
http://www.rickystat..._Regulator.html

Cool dual light setup, without costing a grand!:
http://www.rickystat... light kit.html

  • Ibis

Posted October 27, 2006 - 11:48 AM

#2

If you're getting 17v at the headlight, it's your regulator that's bad not your stator. Same thing happened to my 450. Replaced the regulator (~$50)

  • spidennis

Posted October 27, 2006 - 12:13 PM

#3

I just ordered one thru ThumperTalk OEM for $44.68 plus shipping after searching, reading, asking everywhere I could ..... the schematic doesn't show that the AC reg part is actually part of the DC rectifier and DC regulator, but now that this fact is known, hopefully the next guy to search out this problem comes across this thread and the one I referenced to.


this is a good thread ........
http://www.thumperta...o...ge regulato r

  • Ibis

Posted October 27, 2006 - 01:08 PM

#4

For general info.
The stator has 3 outputs.
1) Ignition
2) AC to the reg/rec for ± 60 watts AC for the lights.
3) AC to the reg/rec for ± 25 watts DC for charging the battery.

I'm guessing here, but I think Yamaha's regulator sometimes goes kaput when pushing the AC current well beyond it's 60 watt output. Mine bellied up after using a 100 watts load with the lights and grip warmers. The telltale sign is fried bulbs and/or 17 volts AC regulator output. BTW, the grip warmers are the hot setup at 17 volts, if you don't mind the grips turning to charcoal.

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  • PBDBLUE

Posted October 27, 2006 - 08:10 PM

#5

Ok. Here's the deal. The lights run off AC and the battery is charged off the 25 watt DC magneto but (and here's the catch) the CDI box also needs 12 volts DC from the DC magneto or the bike will not run. So if you do decide to rewire the magneto and go with everything running off DC be aware that if you do fry the regulator or the magneto in this configuration the bike will not run and you will be walking. Not saying it will happen but it is a risk to consider.

  • spidennis

Posted October 28, 2006 - 04:19 AM

#6

Ok. Here's the deal. The lights run off AC and the battery is charged off the 25 watt DC magneto but (and here's the catch) the CDI box also needs 12 volts DC from the DC magneto or the bike will not run. So if you do decide to rewire the magneto and go with everything running off DC be aware that if you do fry the regulator or the magneto in this configuration the bike will not run and you will be walking. Not saying it will happen but it is a risk to consider.


25 watt DC magneto? You mean the rectifier/regulator here? Anyhow, a DC rewire looks like something for later, and with a chat with mike at Ricky Stator. For now I just want to get my bike running again, but don't want to further fry anything by doing any riding. ..... Guess I'l get some work done this week without any riding til next weekend ..... ug!

  • PBDBLUE

Posted October 28, 2006 - 05:21 AM

#7

Yes. The DC magneto and the rectifier/regulator comprise the circuit that charges the battery and supplies 12 volts DC to the CDI.

  • spidennis

Posted October 28, 2006 - 07:17 AM

#8

Yes. The DC magneto and the rectifier/regulator comprise the circuit that charges the battery and supplies 12 volts DC to the CDI.


I have to disagree, both my meter, my reading of the schematic, and what the yamaha manual shows, the magneto is AC, page 6-1 item #13 and it's called "AC magneto" (in yellow). DC isn't created until after the Rectifier/regulator (item 14, in blue). The AC to the headlight is colored green and the DC is colored in red.

.... and true to the second half of what you said, the rectifier/regulator does charge the battery (with DC).

This is of course for a stock bike (in my case the 03WR250F) , with no aftermarket electrical mods done to it.

The confusion I had originally was with where the AC regulator part was and that is actually part of the "Rectifier/regulator" device or item #14.

Posted Image

  • PBDBLUE

Posted October 28, 2006 - 12:02 PM

#9

Sorry if I confused you. I was just calling it the DC magneto to clarify it from the one that feeds the headlight. All magnetos by their nature supply AC. None the less the magneto output you have highlighted is the one that supplies the headlight. The white wire is the magneto output that through the rectifier/regulator supplies DC power to the battery and the CDI (through the ignition switch). The regulator in a WR is actually two units in the same housing. One part is an AC regulator for the light circuit (connected to the yellow wire) and the the other part is a rectifier/regulator (connected to the white wire) to supply the needed DC power. Hope all this helps clarify.




 
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