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    #1

    getting frustrated, bike wont start again.

    I have a 81 gs550t. I had a problem where the bike would suddenly shut off and wouldnt start again.i took the carbs off cleaned them and and it didnt fix the problem. The i changed the RR got the jetting correct and it ran fine for a few days, better then ever. Everything was fine then it wouldnt start for some reason. I went out a couple days later and it started right back up once i jump started it. I went for a ride took it to the car wash and after washing it, it wouldnt start. It finaly started so i jumped on to ride it home and it just suddenly died and i had to push it home :/

    If it has been sitting for about a day it will cough when i first try to jump start it but then nothing it just cranks and cranks. I checked for spark and it has spark, the carbs are getting fuel from the tank, what could be the problem? What do i need to check?
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    #2
    How did you clean the carbs? Spraying them with carb cleaner and removing the jets to clean them? Or a complete strip and dip? I say this because I thought carb cleaner would solve all my problems and I even soaked the jets in some! But it didn't help at all. I completely tore down my carbs and dipped them and lo and behold! it started right up no problem

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      #3
      Im not positive about much but im sure the carbs dont need to be recleaned it was running great and then boom it wont start. If the carbs needed to be cleaned im sure i would be able to tell be the way it was running, when it was running. Bit no i didnt completly take the carbs apart. The carbs looked very clean inside before i cleaned them. I doubt dirty carbs would cause the bike to run great then just shut off, it has to be something else.
      Originally posted by huntb View Post
      How did you clean the carbs? Spraying them with carb cleaner and removing the jets to clean them? Or a complete strip and dip? I say this because I thought carb cleaner would solve all my problems and I even soaked the jets in some! But it didn't help at all. I completely tore down my carbs and dipped them and lo and behold! it started right up no problem

      Comment

        #4
        Originally posted by Quest View Post
        Im not positive about much but im sure the carbs dont need to be recleaned it was running great and then boom it wont start. If the carbs needed to be cleaned im sure i would be able to tell be the way it was running, when it was running. Bit no i didnt completly take the carbs apart. The carbs looked very clean inside before i cleaned them. I doubt dirty carbs would cause the bike to run great then just shut off, it has to be something else.
        Well, you made mistake #1 looking clean doesn't mean clean. The only way to clean your carbs is a complete strip and dip as mentioned before. You'll need new orings get these at Cycleorings.com. You might need some new fuel bowl gaskets, it just depends. There is a tutorial for cleaning carbs on this forum, follow it to the T. You probably should inspect, clean any and all electrical connections, replace any that are burnt and do a quick test of the charging system. When were the valves last adjusted? Have you check the fuel flow from your petcock? See we be just getting started.
        sigpicMrBill Been a GSR member on and off since April 2002
        1980 GS 750E Bought new in Feb of 1980
        2015 CAN AM RTS


        Stuff I've done to my bike:dancing: 1100E front end with new Sonic springs, 1100E swing arm conversion with new Progressive shocks installed, 530 sprockets/chain conversion, new SS brake lines, new brake pads. New SS fasteners through out. Rebuilt carbs, new EBC clutch springs and horn installed. New paint. Motor runs strong.

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          #5
          The carbs are clean the bime was running great and then.just shut off. How do I test the charging system?
          Originally posted by mrbill5491 View Post
          Well, you made mistake #1 looking clean doesn't mean clean. The only way to clean your carbs is a complete strip and dip as mentioned before. You'll need new orings get these at Cycleorings.com. You might need some new fuel bowl gaskets, it just depends. There is a tutorial for cleaning carbs on this forum, follow it to the T. You probably should inspect, clean any and all electrical connections, replace any that are burnt and do a quick test of the charging system. When were the valves last adjusted? Have you check the fuel flow from your petcock? See we be just getting started.

          Comment

            #6
            Just for the sake of completeness, what kind of car wash did you use to clean your bike? Jet sprays are not usually motorcycle-friendly.

            I'm leaning toward something electrical, but at some point you really should strip and dip the carbs to get rid of any doubt on that front.
            '83 GS650G
            '83 GS550es (didn't like the colours in the 80's, but they've grown on me)

            Comment

              #7
              I used the jet spray but i dont think that is the problem because it was doing it before i took it there and started up afterwards then suddenly died. Im think it is something electrical too but i dont know what to or how to test to figure it out.

              And thanks, for the tip about cleaning the carbs but again they are clean!
              Last edited by Guest; 07-25-2014, 03:25 PM.

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                #8
                Magic cleaning fairies got into all the little passages and freed them up, but they got dirty again and need a real dip? Just saying from experience, because I thought my bike was running ok with just spraying them with carb cleaner, but it wasn't and only got worse. Anyways, here's a link on checking your bikes electrical health

                electrical_odd-n-ends
                http://members.dslextreme.com/users/storagecliff/images/electrical_odd-n-ends.html#A20

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                  #9
                  Thanks for the link. If i thought it was the carbs being dirty i would clean them i would literaly have no reason not to as i want my bike to run.

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                    #10
                    Okay, I'm done with this one, the carbs are clean yada yada yada.
                    sigpicMrBill Been a GSR member on and off since April 2002
                    1980 GS 750E Bought new in Feb of 1980
                    2015 CAN AM RTS


                    Stuff I've done to my bike:dancing: 1100E front end with new Sonic springs, 1100E swing arm conversion with new Progressive shocks installed, 530 sprockets/chain conversion, new SS brake lines, new brake pads. New SS fasteners through out. Rebuilt carbs, new EBC clutch springs and horn installed. New paint. Motor runs strong.

                    Comment

                      #11
                      Why on earth would that upset you?
                      Originally posted by mrbill5491 View Post
                      Okay, I'm done with this one, the carbs are clean yada yada yada.

                      Comment

                        #12
                        Start with checking the cranking voltage at the coils. If you are losing more than a volt from the battery to the coils, clean up all of the connections in that circuit. Voltages below 10ish may not be enough to give a good enough spark.

                        Work off the paradigm of fuel/air/spark. If you are missing one of these, or are not getting compression/spark at the same time, then it's not going to start.
                        '83 GS650G
                        '83 GS550es (didn't like the colours in the 80's, but they've grown on me)

                        Comment

                          #13
                          Originally posted by Quest View Post
                          Thanks for the link. If i thought it was the carbs being dirty i would clean them i would literaly have no reason not to as i want my bike to run.
                          Nope, because never in the history of carb cleaning has some sort of dirt gotten missed and has gotten knocked loose and plugged passages. DIP YOUR CARBS!!!

                          Comment

                            #14
                            What rpm's were you running when it died?
                            If you were at idle,it could indeed be some trash in the carbs.
                            If you were accelerating,I would look at the fuel tank/petcock,etc.

                            Comment

                              #15
                              What did you jump start the bike with
                              My stable
                              84 GSX1100EFG-10.62 @ 125 mph 64'' W/B.
                              85 GS1150-9.72@146mph stock W/B.
                              88 GSXR1100-dragbike 9.18@139.92mph/5.68@118mph.
                              98 Bandit 1200-9.38@146mph/6.02@121mph.
                              90 Suzuki GS 1425cc FBG Pro Stock chassis 5.42@124mph
                              06 GSXR750 10.44@135mph
                              00 Honda elite 80 pit bike

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