Author Topic: Wiring Diagram for YZ250H  (Read 971 times)

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Offline Hughes

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Wiring Diagram for YZ250H
« on: September 07, 2017, 05:48:06 AM »
Anyone have a wiring diagram for an 81 YZ250H that you would share with me? I bought the bike last week. The CDI is disconnected and the kill switch wires are cut. Want to make sure I get it back together right. It was also missing the carb. I know it is a 38 MM but does anyone know what the standard jets were that came from the factory?

Thanks

Kent

Offline rosey250

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Re: Wiring Diagram for YZ250H
« Reply #1 on: September 07, 2017, 10:17:15 AM »
I'll check my owners manual tonight or take some pics of my yz250 H


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Offline T.RexRacing

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Re: Wiring Diagram for YZ250H
« Reply #2 on: September 07, 2017, 10:29:56 AM »
Here's a Yamaha data sheet on the YZ250/490 in my dropbox. Feel free to copy and use.

Whatever you do will be insignificant, but it is very important that you do it.
- Mahatma Gandhi

Offline Hughes

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Re: Wiring Diagram for YZ250H
« Reply #3 on: September 07, 2017, 11:20:52 AM »
Thanks Rosey and T.Rex I appreciate your help.

Offline Cooky375

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Re: Wiring Diagram for YZ250H
« Reply #4 on: September 07, 2017, 11:26:46 AM »
http://www.partzilla.com/parts/search/Yamaha/Motorcycle/1980/YZ250G/CARBURETOR+YZ250G+H/parts.html

I'll take a photo of the wiring diagram when I get home, unless somebody else does.

I have a Mikuni 38mm stock carb if you want it, you would have to rebuild it though.

Cheers,

Cooky

Offline Hughes

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Re: Wiring Diagram for YZ250H
« Reply #5 on: September 07, 2017, 12:41:50 PM »
Cooky I would appreciate the pictures. I'd take you up on your offer of the carb but I am located in the US. To bad I don't travel to Australia for work like I use to.

Kent

Offline Cooky375

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Re: Wiring Diagram for YZ250H
« Reply #6 on: September 08, 2017, 12:13:24 PM »
Sorry I took so long Kent, I couldn't attached the photo's last night and then got busy with kids.
Here you go, I hope it helps.

Offline Hughes

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Re: Wiring Diagram for YZ250H
« Reply #7 on: September 08, 2017, 12:26:02 PM »
Thanks! Very helpful. I appreciate this info.

Kent

Offline Hughes

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Re: Wiring Diagram for YZ250H
« Reply #8 on: September 30, 2017, 01:39:12 PM »
Got the CDI hooked back up and have spark. Kill switch is bad but not a show stopper. Thanks again for the help.


Offline rosey250

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Re: Wiring Diagram for YZ250H
« Reply #9 on: October 02, 2017, 02:08:26 PM »
I had an issue with my killswitch where Barbie  the Yz250H would run but not idle or rev out. Unplugged the killswitch and she ran great. So the switch was not giving a total earth input, just a small earth resistance .
I thought the killswitch 's were only on or off , not on a tiny bit ?!
WD40 into the switch at every wash and Barbie is fine.
Except for when she did her coil........


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