01 WR426 electrical issues?


8 replies to this topic
  • 426PIG

Posted July 21, 2016 - 11:20 PM

#1

Hi everyone,

 

​So the story goes, I got this 01 WR426 off a mate of mine as he upgraded. It's been a great bike to learn to ride on for the last 6 months or so. The only issue the bike had when I bought it was that the stator looked like rats had been gnawing into it, because a previous owner wound the bolts in too far when trying to pull the flywheel off at some point and chewed all the copper coils up.

 

So I bought a parts bike with a blown gearbox and no carb to steal the stator out of and some of the missing lights I need for rego. So I swapped the stators over and all the electrics work perfect except I had no tail/brake light. After doing some research I found out that the WR426 runs on AC current and the LED light I was trying to run doesn't like AC current. So further research found I can run a half wave rectifier to send a DC current to the rear light and it should be sweet. So I go buy all the gear I need, fit it all up to the bike, fire the bike up and still no rear light. So I get the multi meter out and start by looking for a voltage, and couldn't really get a reading (which I did read somewhere is normal cause the sine waves aren't a constant 50Hz and some meters can't read the AC voltage). So I start looking at the continuity in the wires and I'm like 90% sure they are okay and there is no breaks in them.

 

Then out of nowhere I decided that it would be a great idea to connect a blinker globe up to the brake power wire (white wire under the seat?) and see what happens when I touch it to the frame of the bike. Doing this made the bike stop (same as if id hit the stop switch). Problem I have now is the bike wont start at all. I have kicked it and kicked it and kicked it but it still wont fire up, and I can usually get it going from a dead cold start in like 2 or 3 kicks max.

 

So my question is, what have I fried in the electrics that would cause the bike to not start? Is there a fuse or something in them? or have I fried the regulator or CDI maybe?

 

And if anyone knows how I could get my LED tail light to work some info on that would be great cause I'm looking at registering the bike as soon as I can.

 

Sorry for the massive story but I wanted to include as much info as I could

 

Cheers

 



  • Spiritwalker2222

Posted July 22, 2016 - 07:26 AM

#2

Download the manual and go thru the step by step instructions in the electrical section.

 

http://www.yamahaown...ook.com.au/?r=0



  • 426PIG

Posted July 22, 2016 - 06:53 PM

#3

Cheers mate, i have been through all the electrical section in the manual and i still can't figure it out.

  • 426PIG

Posted July 22, 2016 - 09:54 PM

#4

So, i tried connecting the spare CDI unit I have (no idea if its good or not) and it still won't start.

 

All I did was start the bike, connect one wire on a globe to the white wire under the seat and then I touched the other wire of the globe to the bike frame and the bike stopped. Does anyone know how it could cause the bike to not start again?



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  • GuyGraham

Posted July 24, 2016 - 09:40 AM

#5

Do you have a spark at the plug?

  • 426PIG

Posted July 26, 2016 - 04:31 AM

#6

Not yet, that was next on the list to check. I dont think i have a socket that will get in there though, that's why i haven't done it yet

  • GuyGraham

Posted July 27, 2016 - 12:19 AM

#7

You cant problem solve if you dont know what the problem is
No need to get the plug out-pull the plug cap off and put another plug in it and see if there is a spark when its turned over

  • 426PIG

Posted August 02, 2016 - 07:55 PM

#8

Okay, so i got busy and have only just made it out to work on the bike again. There is definitely a spark leaving the coil, but i still can't get the plug out to check it yet (great design putting the spark plug under the frame so you can't get in there with a normal socket, well done yamaha). I also tried switching the regulator over for another one i had lying around but it didnt

  • 426PIG

Posted August 02, 2016 - 07:58 PM

#9

Whoops accidentally hit send, phones and big hands don't work well together sometimes hahaha.

But yeah, its got spark, and swapping the regulators didn't help. Is there a fuse somewhere on them or something that i could have blown by grounding the brake power wire to the frame?




 
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