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removing liquid cooling system to make air cooled

Discussion in 'XJ Modifications' started by John ezzell, May 21, 2018.

  1. John ezzell

    John ezzell New Member

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    Im new to the forum and I am working on an 1986 xj700x. I'm trying to create a bobber out of it. I was wondering if it is possible to remove the radiator cooling system and make it solely air cooled, or if any on has done it.
     
  2. chacal

    chacal Moderator Moderator Supporting Vendor Premium Member

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    Just Say No.............
     
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  3. Minimutly

    Minimutly Well-Known Member

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    You'd have to replace the engine and ancilliaries. Shame to though?
     
  4. Maxim-X

    Maxim-X Well-Known Member

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    Can't be done, these bikes will go into the red zone if you are parked in traffic for too long. If anything they need a larger cooling capacity than what came from the factory. There is one or two threads on here somewhere that shows how to install a manual override for the cooling fan. Think of it this way, would you take the cooling system out of a car and drive it around for any period of time? Air cooled bikes have fins on the heads and barrels to disperse the heat, get an air cooled 700 they look exactly the same but don't have the water jacket, rad etc.
     
  5. John ezzell

    John ezzell New Member

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    Ok thank you so much for your help.
     
  6. a100man

    a100man Well-Known Member

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    Sigh..
     
  7. k-moe

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

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    To clarify this remark. The Maxim-X is both rare and desirable. It's both a financial and (in my opinion) moral obligation to return it to showroom condition if possible, or break it into parts for others to use if it's too far gone to save. It's not often that a manufacturer puts a sportbike engine into a cruiser, and even less common for it to turn out right.
     
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  8. a100man

    a100man Well-Known Member

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    Hi K - thanks. Sort of right plus I can't stand 'bobbers' - even the word makes me squirm. The worst type of customization in my view and no longer true to the origins of the genre, which was to make the machine look more modern. On the other hand I am a miserable, opinionated b@stard - or so my estranged wife tells me.
     
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  9. Minimutly

    Minimutly Well-Known Member

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    As I understand it a bobber is a single seater, low set, with no rear suspension. Look OK if you like that sort of thing, but murder on your back, needs a fat back wheel. Simple basterdised creation, each to his or her own I guess:)
     
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  10. k-moe

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

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    Real bobbers were made between 1930 and 1960 (roughly). Anything newer than that just isn't quite the real thing (but many of them look pretty cool).
    True to form a bobber is a stock bike that has had the fenders cut down (not removed) and other weight-saving modifications made for racing purposes (mainly street racing). Them being hardtails comes from the era in which the practice became popular, when allmost all motorcycles were hardtails. Making a swingarm bike into a hardtail is just not something a racer would do.
     
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  11. XJ550H

    XJ550H Well-Known Member Premium Member

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    bobbers.......I type to slow......even the front brakes are removed
     
  12. Minimutly

    Minimutly Well-Known Member

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    Wait a bit here kmoe, are speedway riders not racers?
    No brakes or rear suspension, originally jap engined I believe? I don't tjik they even used gears?
     
  13. XJ550H

    XJ550H Well-Known Member Premium Member

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    Last edited: May 22, 2018
  14. XJ550H

    XJ550H Well-Known Member Premium Member

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  15. XJ550H

    XJ550H Well-Known Member Premium Member

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  16. k-moe

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

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    But those are not bobbers. Speedway bikes are purpose built (and have been for some time). J.A.P. engines are still predominate, but Yamaha (or is it Honda?) has made some inroads lately.
     
    Last edited: May 22, 2018
  17. k-moe

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

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    Not always. But front brake useage was unpopular in the era, so oftentimes the levers and cables were removed.
     
  18. k-moe

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

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    While this is from a fairly new source, the first three sections of the following article is the definition of a bobber that I grew up with.
    https://www.deadbeatcustoms.com/blog/bobber-motorcycle-history-/

    Like this (borrowed pic):
    [​IMG]

    Notice what's missing, and how the vast majorty of the machine is still stock (including the still connected front brake).

    Add lightness by removing parts. Cheap, reversible, and cool. Calling anything else a bobber is just a case of definition creep (IMHO).
     
    Last edited: May 22, 2018
  19. k-moe

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

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    Link not working.
     
  20. XJ550H

    XJ550H Well-Known Member Premium Member

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    works for me. i love the tail light, seat is a little low
    [​IMG]
     
  21. Maxim-X

    Maxim-X Well-Known Member

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    That is the SADIST looking creation that I have ever seen and it would require a SADIST to ride it with position of the controls and steel tractor seat to plant a tush on! :) :)
     
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  22. k-moe

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

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    Cool, but not a bobber. Almost all of it is shop-made.
     
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  23. Jetfixer

    Jetfixer Well-Known Member

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    I'm a purest I like a stock bike with a few mods made that are subtle ...most of the " bobbers" or my least favorite term " brat bike" or street fighter . A few I have seen look ok and kinda cool ...but I've also seen a bunch that are total hack jobs . Last year my wife was driving , I'm looking around at a stop light look over a dude has 650 maxim on a trailer . It is cut up frame loop hard tailed and everything painted black primer . Was sad looking at least to me ...would have liked to talk to him but he turned the opposite way. But I realize his bike his $$$ so that is all that counts right? :D:p
     
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  24. Oldmansin

    Oldmansin Member

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    This is a xj700 that I bobbed. If it were an xj700x I would've restored it. That said, I passed all the removed parts on to other forum members as the bikes are getting harder to find. IMG_20180421_131440696_HDR.jpg IMG_20180421_131423161_HDR.jpg
     
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  25. MattiThundrrr

    MattiThundrrr Not a guru

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    Bobbing:
    verb (used with object), bobbed, bob·bing.
    1. to cut short; dock
    It actually is from the trimming (bobbing) of the rear fender, so it's not simply removing parts, it is modifying them as well.
     
  26. k-moe

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

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    Yep. But mainly just cutting away the fender skirts, or cutting back the front fender originally. Dirt/gravel roads were still the norm, and flying rocks hurt.
     

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