Question about 1981 Yamaha XS 650 H

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This is Robert with the missing starter button

All the wiring from the ignition was tampered with & the starter button is missing. you were saying I could hardwire it through a fuse to the ignition. could you tell me more?

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Sure mate. There is a cool mod you can do, where you are left with a fuseholder under the seat that bypasses all the safeties, wiring, kill switch, ignition switch and so on. You keep a blown fuse in it to make it all look good,and if  you ever loose your keys, or you get a roadside failure in the ignition electrical system(common problem),pop a good into your "special" fuse holder,  get the bike started with the kicker, and "limp home" so to speak.  I will track down some info on the mod for you. It is also good for eliminating the electrics notorious for failure on these old girls. I will find a link for you to the mod. Just have to find it now. Did this to my own XS650... just in case but have never had to use it. Back shortly:)
regards robotek

Posted on Jan 04, 2009

  • 1 more comment 
  • Graeme Ross
    Graeme Ross Jan 04, 2009




    l and the battery. Locate the fuse holder underneath the seat.
    2. Put a blown fuse in the holder. (To keep the contacts from touching)
    3. When the kill switch fails, or the main fuse blows, lift the seat, put a good fuse (10 A) in the holder and ride on home.
    4. Do not operate the kill switch with a blown fuse as that will "back feed" the short and blow this fuse as well.




    here is the link to another good mod top make. Involves fitting a relay to bypass issues with old brass contacts in ignition switch/kill switch with high resistance.  It eliminates much of the common electrical issues that stop them from starting. 


    here is is a circuit diagram of the mod, in case you cannot see the pictures i
    On the first page of this Post is the quick fuseholder mod... and on from there,page 3 is info for another good mod to make. Involves fitting a relay to bypass issues with old brass contacts in ignition switch/kill switch with high resistance.  It eliminates much of the common electrical issues that stop them from starting. 


    here is is a circuit diagram of the mod, in case you cannot see the pictures in the link.




     Worth joining the 650 garage anyway. Excellent site, solutions for almost any issue that you can have with a 650. 

  • Graeme Ross
    Graeme Ross Jan 04, 2009

    Sorry mate, missed some of the info in the post.



    1.  Connected an inline fuse holder between the ignition coil and the
      battery. Locate the fuse holder underneath the seat.

    2.  Put a
      blown fuse in the holder. (To keep the contacts from touching)

    3. When the kill switch fails, or the main fuse blows, lift the seat,
      put a good fuse (10 A) in the holder and ride on home.

    4. Do not
      operate the kill switch with a blown fuse as that will "back
      feed" the short and blow this fuse as well.

    Hope that worked a little better :)

  • Graeme Ross
    Graeme Ross Jan 08, 2009

    Hi Rob, so do I get a FixYa for my efforts to help you fix you XS. I spent the day working on mine, new coil leads and caps :) . Cheers 

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