Spring identification.

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  • yorkshireracer

    #1

    Spring identification.

    I'm converting my GS550 into a post classic racer and need new fork springs.
    Trouble is, the bike is a complete bitsa with '78 engine and '79 frame and as for the forks ?
    Every model seems to have different springs and the ones in mine don't match anything. Is there any way I can identify what the forks in my bike are ?
  • RichDesmond
    Forum Sage
    Past Site Supporter
    • Jul 2011
    • 2757
    • NoVa

    #2
    Originally posted by yorkshireracer
    I'm converting my GS550 into a post classic racer and need new fork springs.
    Trouble is, the bike is a complete bitsa with '78 engine and '79 frame and as for the forks ?
    Every model seems to have different springs and the ones in mine don't match anything. Is there any way I can identify what the forks in my bike are ?
    It really shouldn't matter, pretty sure all 550s from that era had 35mm forks and should take the same springs.
    '20 Ducati Multistrada 1260S, '93 Ducati 750SS, '01 SV650S, '07 DL650, '01 DR-Z400S, '80 GS1000S, '85 RZ350

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    • tkent02
      Forum LongTimer
      Past Site Supporter
      • Jan 2006
      • 35571
      • Near South Park

      #3
      Post classic racer?

      Is that a polite word for cafe?
      http://img.photobucket.com/albums/v5...tatesMap-1.jpg

      Life is too short to ride an L.

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      • Big T
        Forum LongTimer
        Past Site Supporter
        Super Site Supporter
        • Mar 2005
        • 12401
        • West Slope, OR

        #4
        How long are your springs?

        The aftermarket one are longer than stock
        1978 GS 1000 (since new)
        1979 GS 1000 (The Fridge, superbike replica project)
        1978 GS 1000 (parts)
        1981 GS 850 (anyone want a project?)
        1981 GPZ 550 (backroad screamer)
        1970 450 Mk IIID (THUMP!)
        2007 DRz 400S
        1999 ATK 490ES
        1994 DR 350SES

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        • GregT
          Forum Sage
          • Jul 2009
          • 3541
          • New Zealand

          #5
          My experience has been that std Suzuki forks are undersprung for circuit racing and the rears are oversprung...

          Personally I'd go straight to an aftermarket fork spring - there still may be some fiddling with spacers and oil but it will be a lot closer to correct than OE. I see Progressive list a replacement.

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          • Guest

            #6
            Talk to Rich. I would go for a straight-rate, not progressive.

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