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Norton Featherbed frame info...

This is a discussion on Norton Featherbed frame info... within the General forums, part of the Caferacer.net Forums category; Geets, the 75 may not have been as bad as an early one but 2 times nothing is still nothing. Mine was a 1975 and ...

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  1. #11
    Senior Member o1marc's Avatar
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    Geets, the 75 may not have been as bad as an early one but 2 times nothing is still nothing. Mine was a 1975 and when throwing it from a left hand lean into a right hand lean would throw the thing into a serious tank slapping wobble. I ended up crashing hard doing that last time I rode the thing before totaling the thing out. That wreck is a whole chapter in the book my friends think I should write. It was an interesting night.
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  2. #12
    Senior Member Geeto67's Avatar
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    pay close attention to the thing in denco's guide: bigger frame bolts help. this means the engine is a partially stressed member in the frame. On the later h1's the engine is rubber mounted, just so you know.

    I have seen guys put kawi triple engines in 1980's Zx6R ninja chassis before. To me that's the move. Why the 1980s? because the frames are wishbone but use a lower steel engine mounting cradle that you can easily weld to if needed and therefore doesn't use the engine as a stressed member. With that setup you'd be pretty close to what a formula 1 (now motoGP) 500cc two stroke was in the early 1980s.
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  3. #13
    Senior Member crazypj's Avatar
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    Early Yamaha FZR600 , Suzuki Katana 600 or Suzuki GS500 rolling chassis, perimeter frame, all steel, upgrade suspension and it will be a nice bike
    I dabble in rocket science, when I\'m not picking my nose
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  5. #14
    Senior Member Geeto67's Avatar
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    Quote Originally Posted by o1marc View Post
    Geets, the 75 may not have been as bad as an early one but 2 times nothing is still nothing. Mine was a 1975 and when throwing it from a left hand lean into a right hand lean would throw the thing into a serious tank slapping wobble. I ended up crashing hard doing that last time I rode the thing before totaling the thing out. That wreck is a whole chapter in the book my friends think I should write. It was an interesting night.
    at least it would change direction as compared to say a Z1 where it took directional changes as light suggestions and filed them in the round file.

    yeah the 73-75 frame still needs work. Even a 76 KH500 frame which added most of the bracing mentioned in denco's guide still needs work. But an early h1 frame you could feel wind up underneath you. I have a 1971 bare frame and I can flex it by hand in a lot of spots. I think where kawasaki made the mistake is they made the 73-75 engines rubber mounted and they still used the old small bolts which means the engine was now less than the stressed member it was before. They gave the neck extra suppot but didn't add support to the cradle, esp the needed cross braces (which they did add in 1976). The swingarm wasn't great either, too small. It's another part you can easily flex by hand. The whole frame has a tendency to wind up on you in hard cornering (the cradle tries to shift laterally) and when you transition it "springs" back to shape as you cross the neutral point - hence the wobble.
    Ever tried. Ever failed. No matter. Try Again. Fail again. Fail better.
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  6. #15
    Senior Member TCed's Avatar
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    what was done to the frames on bikes Duhamel rode ?

  7. #16
    Senior Member Geeto67's Avatar
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    Quote Originally Posted by TCed View Post
    what was done to the frames on bikes Duhamel rode ?
    Mojo Kawasaki - DuHamel Works H2R

    Mojo Kawasaki - 78 KR750 (Yvon DuHamel)"
    Ever tried. Ever failed. No matter. Try Again. Fail again. Fail better.
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  8. #17
    Senior Member Geeto67's Avatar
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    Ever tried. Ever failed. No matter. Try Again. Fail again. Fail better.
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  9. #18
    Senior Member Geeto67's Avatar
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    notice the dunstall forks....sexxy but terrible:

    Kawasaki H1R W 500 (1974) | Classic Racing Motorcycles
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  10. #19
    Senior Member o1marc's Avatar
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    None of those show them with the fairing?
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  11. #20
    Senior Member Geeto67's Avatar
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    Quote Originally Posted by o1marc View Post
    None of those show them with the fairing?
    that's kind of the point...so you can see the frame details. those kawi fairings are huge and cover a lot.
    Ever tried. Ever failed. No matter. Try Again. Fail again. Fail better.
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    A tool is just an opportunity with a handle
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