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Returning bike to stock ignition.

Discussion in 'The Garage' started by fiftynineab, Jul 4, 2019.

  1. fiftynineab

    fiftynineab XS650 Enthusiast

    What I have,
    1979 xs650F its a standared.
    First off I have a manual only I don't have it with me. So I apologize for asking questions that I probably could find in there.
    What's going on is I am returning the bike to stock ignition and centrifugal advance after removing a Pemco. Luckily I saved all the stock parts.
    I'm wondering what does torque spec is on the nut that holds the centrifugal advance?
     
    gggGary likes this.
  2. gggGary

    gggGary Stop that! Top Contributor XS650.com Supporter

    :bow: You made a tool to use a torque wrench on it? :bow2:
     
    Mailman, fiftynineab and GLJ like this.
  3. fiftynineab

    fiftynineab XS650 Enthusiast

    Ok i got it. I think what your saying it. There is no torque specification and you just make it tight enough? Because no I did not make a special tool.
     
    Mailman and gggGary like this.
  4. GLJ

    GLJ If you can't laugh at youself you shouldn't laugh Top Contributor

    Just curious why do you want to go back to points???
     
  5. fiftynineab

    fiftynineab XS650 Enthusiast

    Because my Pemco burned up and they no longer make them.
     
    Mailman likes this.
  6. GLJ

    GLJ If you can't laugh at youself you shouldn't laugh Top Contributor

    OK makes sense now. Boyer is not a bad choice. I'm running a Boyer and have no problems with it.
     
    peanut, Mailman and fiftynineab like this.
  7. fiftynineab

    fiftynineab XS650 Enthusiast

    I saw that ignition. Then I read a bunch of stuff about how the plate warps and burns out. And then I read another thing from an old guy saying to run everything stock and it doesn't break. So I'm just going to try and get it back to stock and running. And maybe down the road Morris Magneto.
     
    gggGary likes this.
  8. fiftynineab

    fiftynineab XS650 Enthusiast

    Also I may try Boyer. I need to do some more research before making up my mind. But today I would list want to get it going.
     
    gggGary likes this.
  9. Jim

    Jim I have a plan. It's something to deviate from. Top Contributor XS650.com Supporter

    If it were me, I'd locktite that nut on.
     
    fiftynineab likes this.
  10. GLJ

    GLJ If you can't laugh at youself you shouldn't laugh Top Contributor

    I've only got 600 or miles on my Boyer and it has worked fine.
    Stock ignition is very robust no doubt. When it comes to tuning is when the problem comes in. The 650 is actually 2 engines running as one because of the 2 sets of points and 2 carbs. If the points are set exactly the same then things are great. All the tuning guides tell you to adjust the valves , cam chain and points before doing anything to the carbs. Reason is if one cylinder is firing a degree or so differently from the other you have to compensate with the carb adjustments. Electronic ignition takes timing differences out of the equation. I know with my XS2 that I bought in 76 that it is far easier to tune with electronic ignition than it ever was with points. It runs a hell of a lot smoother than it did in the 70s or 80s. Points can break, but if you understand them you can get them to limp you home. Electronic ignition not so much.
     
    TwoManyXS1Bs, Mailman and fiftynineab like this.
  11. 650Skull

    650Skull Dinosaur Lives Top Contributor

    Read through this link and the posts by Goran Persson and look at the pics in his link........... The warping is due to the plate standoffs not sitting square in the XS650 points housing. This is fixed by making a stepped standoff for the plate.............Has nothing to do with heat, as the first poster thinks, and heat has been used recently by one as a reason for the Boyer plate to warp in stead of the step in the points housing

    http://xs650temp.proboards.com/thread/13335/boyer-ignition-problem
     
    Last edited: Jul 4, 2019
  12. fiftynineab

    fiftynineab XS650 Enthusiast

    Red or blue?
     
    Jim likes this.
  13. Moabite

    Moabite XS650 Enthusiast Top Contributor

    92
    1,604
    143
    Moab, utah
    I'd use red white and blue on 4th July
     
  14. Mailman

    Mailman Hardly a Guru Top Contributor

    Thanks for adding that in Skull, I think that detail is often overlooked.
     
    nhsteve and fiftynineab like this.
  15. Jim

    Jim I have a plan. It's something to deviate from. Top Contributor XS650.com Supporter

    Either would work just fine. Blue would be easier to get back apart if you ever decided to go electronic.
    :laughing:
     
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  16. 650Skull

    650Skull Dinosaur Lives Top Contributor

    Been reluctant to post this regulary due to a member flaming me every time i state the reason for the plate warping problem
     
    fiftynineab and mrtwowheel like this.
  17. fiftynineab

    fiftynineab XS650 Enthusiast

    Thanks everyone for the input!
     
    Jim and Moabite like this.
  18. fiftynineab

    fiftynineab XS650 Enthusiast

    okay so I made it tool. To put a torque wrench on. Do we know what the torque would be. Lol
     

    Attached Files:

    Jim, Mailman, nhsteve and 2 others like this.
  19. Tim Meaders

    Tim Meaders Not another Old man on an Harley! XS650.com Supporter

    Tighten until it stretches 1/32" then place tool for sale on Ebay. :gun::hump:
     

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