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  #1  
Old 15-04-2009
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lighting stator problem - YZ125wr

Just bought this bike and I think I have a problem with my lighting stator - no lights or power to horn etc
One copper wire was loose
(Just want to get RWC)
Can anyone recommend a Brisbane/Sunny coast based person to do a rewind or is there a company that does alternative new parts
Thanks for any help
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Old 15-04-2009
Age100 Age100 is offline
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Your jumping the gun a bit assuming it's the lighting coil have a look at the voltage regulator too and if you have a multimeter set it to the AC range and see if there is an output from the lighting coil & v regulator.

I would guess you should see about 18V at the L coil & 13-14 at the reg output.

Hope this helps.

Age
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Old 15-04-2009
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Thanks
Ill buy a meter and try both - light indicator type isnt showing anything
I am not sure where voltage regulator I guess i ll have to remove tank
I suspect the problem is the stator though
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Old 15-04-2009
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Quote:
Originally Posted by LAPPER View Post
Thanks
Ill buy a meter and try both - light indicator type isnt showing anything
I am not sure where voltage regulator I guess i ll have to remove tank
I suspect the problem is the stator though
Regulator is located in the rh frame spar behind your right knee I think, its about the size of a box of matches with metal ridges on the back. If you buy a multi meter by one with an Ohms range as you can use this to check the resistance of the lighting coil the spec should be in your manual.
Age
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  #5  
Old 15-04-2009
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Tim Langton at suncoast offroad motorcycles is probably the easiest mechanic to work with on the coast and he's got stacks of experiance with 2 bangers.

Nice choice by the way! Those things are a hard find! How much did you pay?
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Old 15-04-2009
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It seems to have power out of stator 15 volts so thanks for the advice

but cant find the regulator I think they are in different places
I think it is a little plastic unit under the horn ( i know which is the flasher unit)
I am having a bad day - now I cant find the wiring diagram
I guess I lll have to book it in with someone to sort it out


Pollock - yes its a lot better than my old Husky wr125 for instant power and no carby jetting issues!!! It flies
Its also lot easier to ride up big hills than youd think too ( easier than my old TE450)
We rode together a few months ago at Yandina with Campy my brother if you recall
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Old 16-04-2009
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The YZWR has a dodgy,add on lighting setup.The steel bracket which is bolted to your top triple clamp,should have a square metal thingo with wires coming out of it attached to it.This the voltage regulator.The yellow wire is AC coming from the stator.The Horn works on DC.The square thingo by the horn with 4 wires coming out of it is the rectifier.This converts the AC to DC.The two yellows are AC,the other two are DC,these go to the horn.The rest go something like this,Brown -Left blinker.Light green -right blinker.Headlight,Yellow-high beam,green-low beam,black -earth.Down the back under your seat ,White-brake light,blue -tail light. Work out if your stator is making any power first,then trace it through the switchgear on your handlebars,then out to the various lights etc.The switchgear is where you will probably have trouble with corroded contacts etc.I had no luck getting sense from a couple of YAMAHA dealers just trying to get a wiring diagram let alone parts,so good luck.I got a rectifier to run the horn from my local GAS GAS dealer as it is the same part.
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Old 16-04-2009
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Slightly off subject here, But Oldboy what's the go with the YZ for sale, didn't you two bond?

BC
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  #9  
Old 16-04-2009
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Quote:
Originally Posted by oldboy View Post
The YZWR has a dodgy,add on lighting setup.The steel bracket which is bolted to your top triple clamp,should have a square metal thingo with wires coming out of it attached to it.This the voltage regulator.The yellow wire is AC coming from the stator.The Horn works on DC.The square thingo by the horn with 4 wires coming out of it is the rectifier.This converts the AC to DC.The two yellows are AC,the other two are DC,these go to the horn.The rest go something like this,Brown -Left blinker.Light green -right blinker.Headlight,Yellow-high beam,green-low beam,black -earth.Down the back under your seat ,White-brake light,blue -tail light. Work out if your stator is making any power first,then trace it through the switchgear on your handlebars,then out to the various lights etc.The switchgear is where you will probably have trouble with corroded contacts etc.I had no luck getting sense from a couple of YAMAHA dealers just trying to get a wiring diagram let alone parts,so good luck.I got a rectifier to run the horn from my local GAS GAS dealer as it is the same part.
Yep sounds like this guy is on to it.
If the lighting coil is outputting 15v my guess would be it's ok. I assume you measured it at 1200rpm tickover ish.

Age
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  #10  
Old 16-04-2009
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does it have the correct stator in it?????????
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