CBR 1000F "Hurricane" 1987-1996 CBR 1000F

upside-down fork transplantation

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Old Feb 28, 2006 | 06:25 AM
  #1  
expedyt's Avatar
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From: Poland/Switzerland
Default upside-down fork transplantation

I know.. ..someone might say it's sick

But my question is: Has anybody done it? I mean throwing away original front fork from SC24 (1990), and replacing it with upside down? If so, which upside down fork you used, to avoid serious frame modifications? (from which motorcycle). I read about transplantation from SP1 to CBR1100XX - it looked great!

Next step - which front fork I shall use to apply radial calipers?

Aaaand what kind of radial brake pump you recommend? Once I had steel brake hoses, but original pump start to leak after few hard stops. So I came back to rubber hoses.

Why to do all that? Coz I'm sick

ps. If these subjects were discussed already - just direct me with link. Thx.
 
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Old Feb 28, 2006 | 05:47 PM
  #2  
geoffv's Avatar
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From: Whitinsville, MA
Default RE: upside-down fork transplantation

Grützi,
Man that is one clean looking sprokett, very impressive. I can't keep mine clean for the life of me
 
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Old Feb 28, 2006 | 08:56 PM
  #3  
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Default RE: upside-down fork transplantation

People have done conversions using GSX1100R forks from the 90's. The problem is that they are not suited for the frame. Your whole forks, frame, rear shock combo is designed as a single unit, messing with that will mess up the flex point. Also as the headstem is not designed for forks that stiff. At the very least the frame flex point will be changed and will flex in places where it is not supposed to. At the very worst the frame will crack.

There are plenty of RWU forks on the market that have full compression/rebound/preload adjustment.

FItting a fork brace will also help.
 
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Old Mar 1, 2006 | 06:02 AM
  #4  
expedyt's Avatar
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From: Poland/Switzerland
Default RE: sprocket

..if you wish to keep it clean (at least for a while), then use a wheel rim cleaner (such like you use for a car) - but it have to be chemically neutral - DO NOT USE rim cleaners acid based, coz they'll just dissolve your o-rings. Spray it allover, wait 15 minutes, clean with sponge, and repeat 3 - 4 times. For winter time you may also clean whole chain this way.

Method checked since last few years he

Trips - thanks for advise - I guess I'll stick to traditional suspension.
 
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Old Mar 16, 2006 | 08:23 PM
  #5  
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Default RE: upside-down fork transplantation

I know it`s an old link but I`ve been trying to source a fork brace for my 1990fl with no luck!

Any ideas?
 
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Old Mar 17, 2006 | 08:57 PM
  #6  
Trips's Avatar
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Default RE: upside-down fork transplantation

ORIGINAL: simochell

I know it`s an old link but I`ve been trying to source a fork brace for my 1990fl with no luck!

Any ideas?
A machinist should be able to knock one up for you.

I have also seen one made out of 2 conrods welded together!
 
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Old Mar 18, 2006 | 05:48 AM
  #7  
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Default RE: upside-down fork transplantation

Thanks TRIPS!My mother in law works at an engineering firm,so I`ll see if she can get one of the guys to knock me one up.
 
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