Stuck Crankshaft!

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  • ColinClayton
    • Feb 2026
    #1

    Stuck Crankshaft!

    I have an 83 GS 550 that has the head and cylinder removed for repairs and while removing the pistons the crankshaft locked and won't move except for a tiny little bit in both directions. Please help! What caused this and how can I fix it?
    Tags: 550, crankshaft, stuck
    • Carter Turk
      Forum Sage
      Charter Member
      • May 2002
      • 2281
      • Bellingham Washington
      #2
      What did you do with the cam chain while rotating? Might be bunched up under the crank.
      GS\'s since 1982: 55OMZ, 550ES, 750ET, (2) 1100ET\'s, 1100S, 1150ES. Current ride is an 83 Katana. Wifes bike is an 84 GS 1150ES

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        • blowerbike
          Forum Guru
          GSResource Superstar
          • Aug 2008
          • 7057
          • Ohio Closer to KY Than Cleveland
          #3
          what he said!

            Comment

            • Sandy
              Forum Guru
              Past Site Supporter
              • Feb 2004
              • 7505
              • Cranbrook, BC Canada
              #4
              Originally posted by Carter Turk
              What did you do with the cam chain while rotating? Might be bunched up under the crank.
              My thoughts exactly ......or something else fell in when you weren't looking. If it did, pull up on both runs of the chain and wiggle to unjam it. If it's really stuck maybe pull the oil pan off.
              '84 GS750EF (Oct 2015 BOM) '79 GS1000N (June 2007 BOM)

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                • GabrielGoes
                  Forum Mentor
                  • Jun 2010
                  • 925
                  • New York
                  #5
                  Ur right there might as well split the cases
                  John 3:16

                    Comment

                    • habsdoc
                      Forum Mentor
                      • Feb 2012
                      • 333
                      • Winnipeg Manitoba Canada
                      #6
                      You don't need to split the cases to unlock the crank shaft. If pulling up on both sides of the chain does not help loosen the crank, then remove the oil pan so you can see what is causing the chain to jam up. Did the bike get knocked into gear???
                      1981 GS 1000GLX.
                      1981 GS 1000G.
                      1981 GS 650GLX.
                      1975 TS 185.
                      1972 100. Kawasaki.
                      1968 100. Suzuki.
                      1970 Z 50. Honda.
                      1984 CT 70. Honda. (Kids)
                      1982 DS 50. Suzuki. (Kids)

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