CRF450R powered cafe build

Discussion in 'Some Assembly Required' started by Captain Yesterday, Jul 29, 2011.

  1. Captain Yesterday

    Captain Yesterday Been here awhile

    Joined:
    Aug 14, 2007
    Oddometer:
    152
    Location:
    Paso Robles
    Now I have a place to post this build since it really didn't fit in any other forum category.

    Anyway the bike started out as a piece of junk 93 nighthawk 250 trainer bike that didn't run, water had gotten into the motor. The nighthawk 250 looks like this but mine was much uglier, hey I cant complain I got it for free, kind of.
    [​IMG]

    I also had a crf450r motor laying around after the kick starter exploded and JB weld up the hole. Then later deciding to uses some of the crf450r parts on other bikes and projects and parting out the rest of it.
    [​IMG]

    So I thought hey lets try and put that 450 motor in a street bike. So far here is the progress. The down tube was cut and a new mount was welded in and I was able to use a modified 450 front aluminum mounts to mount the front of the engine. The rear mounts needed new tabs welded in to extend the stock mounts. The swing arm was shorten by 3 inches. New mounting brackets were welded up for the fiberglass seat pan. The tank is off some 60's yamaha 2 stroke street bike I found in a parts yard. The exhaust is off a CRF250 twin pipe. The front end is off a CB125T MSF trainer bike to get rid of the drum brakes and to lower the front end by 1.5 inches. The pegs are off a CB125T as well. The bars which need to still be shorten are off a XR650L turned up side down and the cross bar cut off. The kick-starter, rear break lever and shift lever all needed to be modified to work. About a foot was cut off the rear sub-frame and more still needs to be cut off. And new mounts for the two crf450 radiators. Can you find were the second radiator is? Still needs a bunch of work but it's getting there.

    [​IMG]
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    Any thoughts on what colors to paint it? As well as going to a 17inch rear wheel over the 16inch?
    #1
  2. crawler07

    crawler07 Adventurer

    Joined:
    Oct 19, 2010
    Oddometer:
    60
    awesome!! I have been wanting to do this for a long time!!Are you going to use the flywheel from the x?
    #2
  3. Captain Yesterday

    Captain Yesterday Been here awhile

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    Yeah I think I'll have to run a crf450x flywheel and stator if I want a head light and tail light.
    #3
  4. MODNROD

    MODNROD Decisions, decisions

    Joined:
    Feb 20, 2009
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    Hehehe.
    That'll bruise some ego's.....

    In the off chance you haven't considered it, might I suggest a fluted cover for the radiator under the seat? Crap thrown off the back wheel WILL hole the thing.
    #4
  5. Captain Yesterday

    Captain Yesterday Been here awhile

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    Yeah a radiator guard is another thing on the list to do.
    #5
  6. Pezz_gs

    Pezz_gs Cant ride for crap

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    Nov 13, 2004
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    3,874
    Location:
    Sydney Skunkworks
    Now this is a nice way to do it :clap

    :lurk
    #6
  7. Fictitious

    Fictitious Been here awhile

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    Jul 24, 2009
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    203
    Location:
    British Columbia
    This looks awesome :D True to the cafe spirit :p
    #7
  8. shortridz

    shortridz ShortRidz

    Joined:
    Apr 8, 2004
    Oddometer:
    84
    Location:
    Chrystal Lake. across the street from the water
    Yer gona need bigger brakes...or a louder horn.:D
    #8
  9. Captain Yesterday

    Captain Yesterday Been here awhile

    Joined:
    Aug 14, 2007
    Oddometer:
    152
    Location:
    Paso Robles
    Some weekend progress.
    [​IMG]

    Shifter is a bit stiff, haven't decided if I'm going to change it or not.
    [​IMG]

    Fabricating up the exhaust with a bunch of U bends. Since this was my first time fabricating an exhaust system I thought it was going to be hard. Well it didn't turn out as hard as I thought,never the less I still made some mistakes, o well live and learn.

    [​IMG]

    [​IMG]

    [​IMG]
    #9
  10. dukerollo

    dukerollo n00b

    Joined:
    May 18, 2009
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    4
    Location:
    Desert Wasteland
    Great project. In for updates.
    #10
  11. Daamud

    Daamud Life is like a box of Old Milwaukee

    Joined:
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    :lurk
    #11
  12. Dave in Wi

    Dave in Wi Long timer

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    Madison WI (40 Square Miles Surrounded By Reality)
    Can't wait to see how this turns out. Very cool. Except for the seat, that will be HOT!
    #12
  13. Bloodweiser

    Bloodweiser honestly

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    way over yonder in the minor key
    I like your style. :deal


    but why a 1-2 exhaust?
    #13
  14. Reposado1800

    Reposado1800 Juicy J fan!

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    5th and Main
    Yer gonna kill yerself.:evil
    #14
  15. Captain Yesterday

    Captain Yesterday Been here awhile

    Joined:
    Aug 14, 2007
    Oddometer:
    152
    Location:
    Paso Robles
    To keep with the theme of the bike, Also I had them laying around and they fit the look of the bike.

    Some more update pictures. Unfortunately I wont get a chance to work on it for another month, so no more updates for awhile. Hopefully I'll be done with the bike towards the end of Sept.

    Also, I ended up weighing the bike and it's 230lbs. :clap

    [​IMG]

    [​IMG]

    I'm going to get rid of the right side gauge and replace the inners with a temp sensor.
    [​IMG]

    [​IMG]
    #15
  16. DELTATANGO

    DELTATANGO Motorcyclist and Dog Walk

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    Alabama
    It's ugly but I bet it will outrun a telephone call.
    #16
  17. Lutz

    Lutz Killer Rabbit

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    Very cool stuff.
    #17
  18. zuk16l

    zuk16l Adventurer

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    Dec 21, 2006
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    95
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    Milwaukee, WI
    Ugly hell! I think it looks bad ass! I can't wait to see what you do next.
    #18
  19. MODNROD

    MODNROD Decisions, decisions

    Joined:
    Feb 20, 2009
    Oddometer:
    2,202
    Location:
    Midwest, West Oz
    230lbs?!?!?!
    HAHA! HAHA! HAHA.......HEE!HEE!

    :deal
    #19
  20. Lutz

    Lutz Killer Rabbit

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    I love how it looks, but I would keep an eye on the engine mounting and frame. That's a torquey motor there, and only supported at two (?) points. Add in that the down tube is not tied back into the rear portion of the frame - well, just keep an eye on it I guess. I can envision some flex, vibration, and/or fatigue issues developing.
    #20