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1981 XJ650 Alaskan Bobber Project

Discussion in 'XJ Modifications' started by Roguesaint, Nov 1, 2012.

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  1. Polock

    Polock Well-Known Member

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    i don't see any pictures either, just a -
     
    Polock, Sep 4, 2015
    #101
  2. aktoddc

    aktoddc Member

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    I set up a dial indicator in through the #1 cylinder today to verify that the pointer was at TDC. It was off by a tiny bit. I've rotated the engine quite a few times and the marks stay consistent. At this point, I'm convinced the cam chain is stretched and/or the machinist took more off the head than he is saying. I'm going to replace the chain with a new one and go from there. Thanks everyone for the input.

    -Todd
     
    aktoddc, Sep 4, 2015
    #102
  3. Polock

    Polock Well-Known Member

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    go for it, i'd like to see how much it changes
     
    Polock, Sep 4, 2015
    #103
  4. jayrodoh

    jayrodoh YimYam

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    I wasn't implying that it would line up if you keep rotating, was just mentioning that I rotated the crankshaft back (CCW) to T after installing the chain tensioner while the marker was at the C mark as the manual states.

    Did you try going through the process again? The exhaust sprocket looks to me like you're one tooth off. I know it seems like one tooth would move the mark quite a bit, but it does not. For example a 5 degree rotation at the sprocket would result in the tooth physically traveling further than the mark on the camshaft. I can't think of a good way to explain that but I only mention this as I was in the exact same spot you were until I redid the process a second time. It's kind of a PIA to pull off the tensioner and reset it to do it all over again but I got it my third time.

    You would have to shave a ton off to be that far off.
     
    jayrodoh, Sep 8, 2015
    #104
  5. rocs82650

    rocs82650 Well-Known Member

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    +1.

    Gary H.
     
    rocs82650, Sep 8, 2015
    #105
  6. aktoddc

    aktoddc Member

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    Update: I finally replaced the timing chain with a new unit and now the marks line up perfectly. I guess the chain was stretched enough to throw the marks off slightly.

    -Todd
     
    aktoddc, Nov 28, 2015
    #106
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  7. aktoddc

    aktoddc Member

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    I mocked up the exhaust today in PVC. Thoughts? I like the twin slash cut pipes, but think I need more angle on them to match the rear frame support.

    -Todd




    IMG_2151.jpg upright. IMG_2153.jpg
     
    aktoddc, Sep 3, 2016
    #107
  8. Skwerly

    Skwerly Member

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    i think that looks great!
     
    Skwerly, Sep 4, 2016
    #108
  9. aktoddc

    aktoddc Member

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    Fabbed up the headlight bracket and got it mounted-

    IMG_2210.jpg IMG_2211.jpg
     
    aktoddc, Oct 23, 2016
    #109
  10. Skwerly

    Skwerly Member

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    awesome work!
     
    Skwerly, Oct 24, 2016
    #110
  11. rocs82650

    rocs82650 Well-Known Member

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    You'll be into the brake pedal before they hit the down support angle.

    Gary H.
     
    rocs82650, Oct 24, 2016
    #111
  12. steber

    steber Active Member

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    Nice build.. Looks like the fender mounts were shaved off the front fork tubes, run into any issues? thinking of doing this to my bike.
     
    steber, Oct 24, 2016
    #112
  13. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    And the sharper the bend, the lesser the powah.
     
    k-moe, Oct 24, 2016
    #113
  14. aktoddc

    aktoddc Member

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    They were shaved when I got the bike....I'd prefer to keep them and run a custom brace. I have a smaller front wheel and the forks are raised in the trees, so I may be ok. Won't know if I'm having any flexing issues till I get it out on the road.
     
    aktoddc, Oct 25, 2016
    #114
  15. aktoddc

    aktoddc Member

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    Not with a mandrel bend:)
     
    aktoddc, Oct 25, 2016
    #115
  16. aktoddc

    aktoddc Member

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    Exhaust mocked up today...no interference with the brake pedal:)


    -Todd


    IMG_2221.jpg
     
    aktoddc, Oct 25, 2016
    #116
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  17. steber

    steber Active Member

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    Looks good, this is exactly what I was thinking about doing for my build, you beat me to it!
     
    steber, Oct 25, 2016
    #117
  18. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Yes, even with a mandrel bend. There are limits to everything.

    The new mock-up looks good, and should flow well.

    You will have fork flex. The stock fender included a fork brace. Should be pretty easy to fab a good looking clamp-on brace though.
     
    k-moe, Oct 25, 2016
    #118
  19. aktoddc

    aktoddc Member

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    Well, I was having trouble finding space to mount an electronics box, so I scrapped the original battery box and purchased this one from Billet Proof. Its designed to house an Antigravity 8 cell battery, plus I will have the igniter, starter relay and fuse panel in there. I'll likely have it powder coated black with the fins natural.




    IMG_2273.jpg


    IMG_2272.jpg
     
    aktoddc, Nov 26, 2016
    #119
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  20. aktoddc

    aktoddc Member

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    Dyna Coils mounted up today-



    IMG_2275.jpg




    IMG_2275.jpg
     
    aktoddc, Nov 27, 2016
    #120
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