• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

newer gsxr inverted front end swap

  • Thread starter Thread starter hotbox05
  • Start date Start date
spdjunkie said:
I'm putting a set of 2001 GSXR750 usd forks on my '83 1100E via a '92 or '93 (not sure which) GSXR1100 lower & stem, and a CBR954RR upper triple. All I had to do was have 2 aluminum bushings made to adapt the lower to the fork tubes (the triple was about 2.5mm too loose for the forks), and a smaller steel bushing made to go in between the upper triple and the stem, as the stem is too small for the triple. I've gotten most of my info from Katman, though that was over 1-1/2 yrs ago, and I believe he went a little different route. Anyway, the 954 upper is what he recommended because they're a dropped triple, and give you another inch of clearence for those shorter usd forks.

There are some really great threads on this elsewhere in performance mods, and in Katmans "Building an I.C.B.M. Katana" thread.
Click to expand...


the 954 upper is a diff offset than the 1100 lower so you can' t use it and be safe riding. You have to use the complete 754 triple set up. your forks will slip right in properly with no bushings. The 1100 lower is 56mm and the 750 forks you are using are 54mm.

My advise is don't mix and match tooo much or you will be headin for trouble. Believe me... I have done it already.

One other thing, the '01 forks are an inch shorter than the '90's and you have to use the newer wheel without a speedo drive so you will need to get an electronic speedo if that sort of thing interests you at all. Some guys don't care if they have a speedo.
 
Last edited:
Hey Rob, thanks for the advice. I'm actually having a guy I work with plot the center points on both triples today using some very expensive inspection equiptment. If they all line up, I'm set. If not, I guess I'm going to be in the market for a set of early '90's GSXR1100 forks. I'm already going with a Veypor, so the speedo is not an issue.
 
Well, I just got the results. There's only a .014" difference between the center-to-center points of the fork rings, but there's a .090" difference in the offset of the steering pivot point. The larger offset is the lower clamp so that translates into slightly more rake & trail at the front axle. Taking the top triple as the starting point, and adding another two thirds (a little more, really) it still only makes for about 3/10 of an inch forward of where the axle would've been. I think these are acceptable numbers, as the more important thing is the spacing of the clamps, since the forks need to be utterly parallel. The only thing I'm worried about now, is maybe having to grind a bit out of the upper rear, and lower front of the lower clamp bushings I'm having made, to accomadate the very slight difference in angle. That shouldn't be a problem either, since the bushings are only for "pinch" to make up the difference in clamp I.D. and fork O.D.

I'll try a mock-up later to dertermine geometry, & safety, etc. but I don't want to continue to hijack this thread.
 
You must log in or register to reply here.
Back
Top