SR250 schematics

Last Sunday a few of us helped Mick sort out his SR’s wiring. The stock harness, in my opinion, is unnecessarily bulky with safety relays and switches. This inspired me to see if I could design something streamlined while still using the stock controls and dash gauge… this is what I came up with:

I found the stock diagram at the Philly Free Library. They have a decent selection of automotive and motorcycle manuals in their reference section. “Being a Yamaha owner, you obviously prefer a quality product”… These old shop manuals are awesome.

15 responses to “SR250 schematics”

  1. ed says:

    so… is it gonna work?

  2. Adam says:

    See if you can find any flaws in it but I am confident that this works… The Yamaha setup is a bit different than the Hondas so it was different than when we did your 650.

    I can scan the OEM diagram and my diagram at work for a bigger high res copy.

  3. ludwig says:

    looks good man. I think my next project is going to be a sr500, love these little thumpers.

  4. chris says:

    i know of a sr500 for sale and a 1970 cl350 locally both running if anyone’s interested.

  5. Adam says:

    How much for the sr500?

  6. Chris says:

    I think he wants 1000 for it

  7. ludwig says:

    damn! i need a 1000 dollars asap.

  8. chris says:

    also a 1976 cb250 mint…i hooked up with a guy who lets me know when hes pickin up bikes of interest…i told him about chinonthetank and he’s always got bikes comin thru his shop.

  9. mick says:

    picked up the multi-meter.

    what should i be testing in the ignitor unit? that all connections hold current?

  10. andrew says:

    chris how much for the 250? Title?

  11. Todd says:

    I’m looking to sell my 350 by spring, clean title.

  12. andrew says:

    ha, i got a 360 as well, curious about the 250 for my GF.

  13. Adam says:

    Mick, one of the copies I made front the Yamaha service manual has the introduction to the TCI unit which I bet has the procedure of how to test it but I don’t have copies of the following pages unless it’s on one of the sheets I left with you.

  14. chris says:

    now i want an sr250 that thing is cool.

  15. Gabriel says:

    Good day will you be able to send me the simplified wiring diagram of the yamaha sr250 plz

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