Engine seized on my GS 700e

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  • mctaylor42
    • Feb 2026
    #1

    Engine seized on my GS 700e

    I bought this bike a few days ago, 1985 GS700e, looked ok, ran great, sounded great, seemed like a perfect buy. Iv'e now ridden it about 70 miles and the engine suddenly seized. I was riding in town, grabbed the clutch to to down shift and the motor froze solid, haven't been able to turn it since. I'm wondering where to go from here, I've had a blast the last couple of days, so I'd like to keep the bike if I can, thanks in advance.
    Tags: None
    • hillsy
      Forum Sage
      • May 2008
      • 1469
      • Brisbane, Queensland, Australia
      #2
      I guess you have to find out why / how it has seized to work out whether it is repairable or junk.

      Take off the cam cover and see if the camchain is intact would be the first step.
      Current:
      Z1300A5 Locomotive (swapped my Intruder for it), GS450 Cafe Project (might never finish it....), XT500 Commuter (I know - it's a Yamaha :eek:)

      Past:
      VL1500 Intruder (swapped for Z1300), ZX9R Streetfighter (lets face it - too fast....), 1984 GSX750EF, 1984 GSX1100EF (AKA GS1150)
      And a bunch of other crap Yamahas....

        Comment

        • Guest
          #3
          Oil? Did the engine lock up or the tranny?

            Comment

            • mctaylor42
              #4
              The oil was clean, looked recently changed. Pretty sure its the motor itself, it still shifts and will roll in neutral. Probably won't get time to start digging until thursday.

                Comment

                • hillsy
                  Forum Sage
                  • May 2008
                  • 1469
                  • Brisbane, Queensland, Australia
                  #5
                  How did the motor sound when it stopped? Did it just stop quietly or did it go bang?
                  Current:
                  Z1300A5 Locomotive (swapped my Intruder for it), GS450 Cafe Project (might never finish it....), XT500 Commuter (I know - it's a Yamaha :eek:)

                  Past:
                  VL1500 Intruder (swapped for Z1300), ZX9R Streetfighter (lets face it - too fast....), 1984 GSX750EF, 1984 GSX1100EF (AKA GS1150)
                  And a bunch of other crap Yamahas....

                    Comment

                    • Guest
                      #6
                      I have a 83" 750 motor that will slide right in there. 18000, miles, needs stator cover yours should fit. $250. You pay shipping. PM me if interested

                        Comment

                        • mctaylor42
                          #7
                          Originally posted by hillsy
                          How did the motor sound when it stopped? Did it just stop quietly or did it go bang?
                          No noticeable noise, I just thought it had died until it would crank back over.

                            Comment

                            • mctaylor42
                              #8
                              Originally posted by hjfisk
                              I have a 83" 750 motor that will slide right in there. 18000, miles, needs stator cover yours should fit. $250. You pay shipping. PM me if interested
                              Sent you a PM

                                Comment

                                • hannibal
                                  Forum Sage
                                  • Jun 2015
                                  • 1033
                                  • Washington DC
                                  #9
                                  I had similar symptoms when my cam bolt backed out and snapped the timing chain. I second pulling the cam cover to have a look at the chain.
                                  Jordan

                                  1977 Suzuki GS750 (My first bike)
                                  2000 Kawasaki ZRX1100
                                  1973 BMW R75/5

                                    Comment

                                    • mctaylor42
                                      #10
                                      Originally posted by hannibal
                                      I had similar symptoms when my cam bolt backed out and snapped the timing chain. I second pulling the cam cover to have a look at the chain.
                                      So I pulled the valve cover to check the timing chain, but I'm having trouble finding it.


                                      Damage report:
                                      1 missing valve adjustment screw
                                      2 broken tapits
                                      1 broken chain

                                      will update after more digging

                                        Comment

                                        • steve murdoch
                                          Forum Guru
                                          Past Site Supporter
                                          • May 2004
                                          • 8491
                                          • St. Catharines, On.
                                          #11
                                          That's rough, mctaylor.
                                          Looks like your helper in the background is just as surprised.
                                          2@ \'78 GS1000

                                            Comment

                                            • storm 64
                                              Forum Sage
                                              Past Site Supporter
                                              Super Site Supporter
                                              • May 2012
                                              • 4586
                                              • Youngstown,Ohio
                                              #12
                                              Originally posted by steve murdoch
                                              That's rough, mctaylor.
                                              Looks like your helper in the background is just as surprised.
                                              He's thinking "In all my years as a shop dog I've never seen anything like this" ☺
                                              My Motorcycles:
                                              22 Kawasaki Z900 RS (Candy Tone Blue)
                                              22 BMW K1600GT (Probably been to a town near you)
                                              82 1100e Drag Bike (needs race engine)
                                              81 1100e Street Bike (with race engine)
                                              79 1000e (all original)
                                              82 850g (all original)
                                              80 KZ 650F (needs restored)

                                                Comment

                                                • Guest
                                                  #13
                                                  Originally posted by storm 64
                                                  He's thinking "In all my years as a shop dog I've never seen anything like this" ☺
                                                  That look says "what did you just say?".

                                                    Comment

                                                    • Guest
                                                      #14
                                                      another victim of an improperly tightened screw adjuster?

                                                        Comment

                                                        • mctaylor42
                                                          #15
                                                          Originally posted by greg78gs750
                                                          another victim of an improperly tightened screw adjuster?
                                                          Seems that way. I think, at this point, a new head is my best option.
                                                          Last edited by Guest; 05-19-2017, 01:05 PM.

                                                            Comment

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