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1980 XS650 Brat/ Bobber/ Chopper/ Who Knows? Build

Discussion in 'The Garage' started by B_Crabaugh, Jan 4, 2019.

  1. B_Crabaugh

    B_Crabaugh XS650 Addict

    I don’t claim to be the smartest guy in the garage, but I’m pretty happy about this. I needed to press the cam seals out and thought to do the ol’ vice and socket trick, but couldnt find a socket the right size. Then I spotted my rear wheel dust seal thingamajig.
    5931DF68-D4D9-4327-8732-B54D207A5B1A.jpeg

    Turns out it’s a perfect fit! (It also needs a cleaning!)
    2A8FE8E0-4CDC-4B00-BF3B-827183A5EAE6.jpeg

    I popped it in my tiny sorry excuse for a vice along with two scrap pieces of wood (one of them even had a screw in it to help keep it from slipping off!).
    4C88667F-DC82-4C84-9D10-7D0C60F29BE8.jpeg

    And with a flip of the wrist. The sucker popped right out!
    5555B38E-4504-4BC4-B092-CDB8E4E41A64.jpeg

    Question: Do you guys put the new seal in dry or grease it up?
     
    Mailman, TwoManyXS1Bs and Jim like this.
  2. Superjet

    Superjet XS650 Junkie Top Contributor XS650.com Supporter

    While I was sleeping, Jim beat me to it!!! Calipers are your friend and I used the channel as a reference point for centering.
     
    Jim likes this.
  3. Jim

    Jim The thrill of victory and da agony of da feet. Top Contributor XS650.com Supporter

    I usually put a little gasket sealer on 'em.
     
  4. B_Crabaugh

    B_Crabaugh XS650 Addict

    So fellas, what do ya’ say? Do I tear it down and check the guide? Jim, would I have to remove the aircraft sealant? What about the copper gasket spray?
     
    Jim likes this.
  5. Jim

    Jim The thrill of victory and da agony of da feet. Top Contributor XS650.com Supporter

    Shouldn't have to. Might have to add a little back. As far as pulling it back apart... that's your call. I probably would, but I have a pretty bad case of ocd. :rolleyes:
     
    gggGary likes this.
  6. Jim

    Jim The thrill of victory and da agony of da feet. Top Contributor XS650.com Supporter

    Re-read my top end thread. I just eyeballed mine with the cylinders installed. I'm 100% confident I got it straight. You could get away with leaving the cylinders installed if you're confident in your Mk.I eyeball.

    iris.jpg
     
    Mailman, gggGary and B_Crabaugh like this.
  7. 59Tebo

    59Tebo 59Tebo Top Contributor

    Eyecrometers! :wink2:
     
    gggGary, B_Crabaugh and Jim like this.
  8. B_Crabaugh

    B_Crabaugh XS650 Addict

    I’m opting to go with the eycrometers! But I am wondering that why one can’t loosen the front guide, torque everything down, then add some tension from the rear guide, rotate the crank and let the front guide adjust itself, THEN snug it down. Tell me why I’m wrong!
    Also, I was cleaning my sump filter plate and wondering why Yamaha plugged this passage this way. Has anyone thought to tap this hole and run a line from it to another engine entry to possibly circulate oil. Thoughts?

    6501E34E-6B95-4CBC-B1D3-493F721D9687.jpeg
    20682408-16B4-4609-AEA6-157E934BBD2D.jpeg
     
    Jim likes this.
  9. Jim

    Jim The thrill of victory and da agony of da feet. Top Contributor XS650.com Supporter

    That would get you close, but one side or the other would still rub. Might be OK.... might not... no way to know for sure without "eyes on."

    That plug is a machining plug to plug where they machined out the passageway.
     
  10. B_Crabaugh

    B_Crabaugh XS650 Addict

    Yeah that makes sense about the guide. I wish I had a little video scope!

    That’s what I figured about that plug. Could there be any possible advantages in using it to re-route oil flow or run a cooler line to it?
     
    Jim likes this.
  11. Jim

    Jim The thrill of victory and da agony of da feet. Top Contributor XS650.com Supporter

    Not that I can see. You'd have to route the oil out the plug and then back in to the hole directly behind the plug. Not much room on the plate for that.
     
    TwoManyXS1Bs likes this.
  12. B_Crabaugh

    B_Crabaugh XS650 Addict

    Sounds quite pointless! Also sounds like I have much fire to learn about the oil delivery system haha
     
    Jim likes this.
  13. TwoManyXS1Bs

    TwoManyXS1Bs BBQ Hunter Top Contributor

    Ideally, you'd like to have 1/2mm spacing, both sides of the camchain.
    XS650-GuideFit01.jpg

    But, the head and cam would have to be installed to see where the camchain is running.

    Thought about cooking up a long u-shaped alignment tool. Slide it in there, spanning both sprockets, with the front guide loosened. Cross-section like this red line.
    XS650-GuideFit01b.jpg

    A headache-in-process...
     
    Jim likes this.
  14. B_Crabaugh

    B_Crabaugh XS650 Addict

    That is a really good idea. Something 3D printed would probably be the way to go. The reason I am not totally buying how critical the alignment is, is that no matter what, there will be some amount of lateral movement. Also, none of the manuals even mention this adjustment. It seems to me that cam chain tension would be much more critical to regulate that movement. With that being said, folks with much more experience than me feel otherwise.
     
    Jim likes this.
  15. B_Crabaugh

    B_Crabaugh XS650 Addict

    Just tore the top end down and rechecked the tensioner. It was fine and like I previously said, there was virtually no play when the bolts are finger tight. Tightened them all the way, switching from top to bottom bolt each turn of the wrench. I am using a mikes tensioner, so maaaaybe that has something to do with it. I have piece of mind now, but wrastlin’ the chain back in place was not my favorite. Hahaha. Moving on!
     
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  16. Jim

    Jim The thrill of victory and da agony of da feet. Top Contributor XS650.com Supporter

    254___thumbs-up-emoji.png
     
    B_Crabaugh likes this.
  17. B_Crabaugh

    B_Crabaugh XS650 Addict

    Funny how I spell “piece of mind”. My brain just instantly thinks of the Iron Maiden album hahaha

    F6CAEC52-2E58-4ADB-A870-D72CB44303C9.png
     
    59Tebo, Jim, gggGary and 1 other person like this.
  18. gggGary

    gggGary Stop that! Top Contributor XS650.com Supporter

    Removing that plug would open a passage that is at a slight vacuum. The oil pump pulls oil up from the sump screen.
    That's a simplification, but the general idea.
     
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  19. snoosky

    snoosky XS650 Member

    10
    6
    3
    97124
    Havent been on the forum in awhile. Stoked to see someone in the Portland area with an XS. Im eventually going with a chopper, brat, something build too. Ive got a 79 Im playing with now. Hit me up up you need a hand or just a drinking buddy.:lmao:
     
  20. B_Crabaugh

    B_Crabaugh XS650 Addict

    Right on! Get to posting and show off your bike!
     
    Moabite likes this.

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