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Lowering your xj650

Discussion in 'XJ Technical Chat' started by Victa, Mar 9, 2009.

  1. Victa

    Victa Member

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    Is it possible to lower my 1982 xj650rj seca? An inch or 2 would be great. If it is possible can you tell me how...lol

    Thanks Guys

    victor
     
  2. stevetibb2000

    stevetibb2000 Member

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    you can get the seat shaved thats what i did to mine and i also lower the front forks to touch the handle bars but you might get a wobble at about 75-80mph im 5'4" i could touch the ground after wards
     
  3. Victa

    Victa Member

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    lowering the front forks seems to be the low cost answer i've found after doing my research.
    just an inch or so should help.

    thanks for the answer

    victor
     
  4. HalfCentury

    HalfCentury Member

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    Loosen the triple trees and let the bike slide down the fork tubes as far as they can.
     
  5. circathomas05

    circathomas05 New Member

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    Regarding this: I've loosened what I found on the triple tree and the fork tubes aren't budging at all... any ideas?
     
  6. k-moe

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

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    While on the center stand; prop the front of the bike up by the frame, and remove the front wheel. That will allow the fork legs to move wihout binding in the clamps. You may need to give each upper leg a twist to get them to move.

    What are you going to do to lower the rear? Messing with ride-height also changes trail, which will effect handling (and not necessarily in a good way, depending on how far you go).
     
  7. circathomas05

    circathomas05 New Member

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    You, Sir, are amazing.
     
  8. k-moe

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

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    Nope. I've just made a lot of mistakes, and learned from them.
     
  9. circathomas05

    circathomas05 New Member

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    Makes sense. I'm brand new to motorcycles, and am the proud owner of an '82 750 Maxim. Thanks a lot for the help!
     
  10. k-moe

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

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    You Maxim is different. Yours has air assisted forks. To lower those you will need to slide the forks down, remove the thin circlip that is just below the air collars, remove the rubber donuts (above each collar) and the air collars, slide the fork back up to its new height, and either plug the air holes in the upper fork legs, or set the fork legs up high enough that you can re-install the air collars.

    Please note that I'm not recomending that you lower the forks at all, particularly on the 750. It will effect both handling and straight-line stability. SInce you are new to motorcycles I would suggest that you ride it in stock condition first (following a MSF course, and ctching up on the maintenance schedule), and read any number of books on suspenion tuning and motorcycle design. Motorcycles will bite your ass if you change things without knowing what all the effects of each change will be.
     
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  11. circathomas05

    circathomas05 New Member

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    Ah, thank you. I thought there had to be more to it.
     
  12. k-moe

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

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    Check my edited post.
     
  13. circathomas05

    circathomas05 New Member

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    Checked & heeded. I'll keep it "as-is" for now. Thanks, K-moe!
     
  14. 12Rant

    12Rant New Member

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    I'd like to lower my 650 Seca as well and I was wondering since I'll be buying new shocks can I go to 11 or 11.5 inches or will this adversely the travel of the swing arm. The seats been recently re holstered and I'd like the padding.
     
  15. TIMEtoRIDE

    TIMEtoRIDE Active Member

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    Somebody lowered the rear 5 (FIVE) inches while hard-tailing, and the driveshaft "U" joint held up despite all the Wizards here saying it wouldn't.
     
  16. Orange-n-Black

    Orange-n-Black Well-Known Member

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    I knew you could go as much as 2 inches, but its hard to know how much until you do it. One of those check the angle as you lower deals, too much angle will damage the joint over time/use.
    How long did/has it lasted?
     
  17. TIMEtoRIDE

    TIMEtoRIDE Active Member

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    I'm not sure if it was "Crath" or who, it was a while ago, and they dropped the frame's rear hoop onto the tire and started fabbing at that swing-arm angle. This bike ran for months with no problems that I know.
    This would also give maximum "rake" without welding the head-tube.
     
  18. k-moe

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

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    I'd be hesitant to go much beyond the normal wheel travel limit. Those U-joints are expensive.
     
  19. Orange-n-Black

    Orange-n-Black Well-Known Member

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    I am 5'8" tall, or at least was. My 700 Maxim was just the right height. I can see lowering 2 to 3 inches, but 5 inches seems too much to me. One thing about going that low, is the float bowl level in the carbs since the motor would be tilted back at an angle.
     
  20. Hotcakesman

    Hotcakesman Active Member

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    I still think shaving the seat is the best option
    yes it might be freshly upholstered
    but why not add a gel pad.. then reupholster it
    it can be shaved with a good bread knife
    and vinyl is very cheap
    you just have to use a power stapler to get it back on
    I shaved mine.. I am 5'8 and it is perfect now
     

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