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  • #41
    That will also work. You can check from either side but the main goal is "No" leakage and use a thinner viscosity fluid.

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    • #42
      I was also told I will have to get new rings since I pulled everything off. Is this a true statement?

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      • #43
        That is 100% false. Who in the hell are you talking to that told you that?

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        • #44
          My wife's best friends boyfriend. He knows a lot about cars. Guess not so much about bikes

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          • Bikerron
            Bikerron commented
            Editing a comment
            Piston engines are pretty much all the same no matter what they are powering.

            Just pulling the head off of one does not disturb the piston rings.

        • #45
          Ok while I have everything pulled off I want to go ahead and do the ais removal. Seems that is suggested to be done by everyone. Anyone got pics of exactly what I take off and where the 45 casings would go?

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          • #46
            Originally posted by Snow View Post
            My wife's best friends boyfriend. He knows a lot about cars. Guess not so much about bikes
            I'm not sure I'd be listening to him at all. Even on a car, if you pull the head, there is no reason to re-ring.

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            • #47
              Originally posted by Snow View Post
              Ok while I have everything pulled off I want to go ahead and do the ais removal. Seems that is suggested to be done by everyone. Anyone got pics of exactly what I take off and where the 45 casings would go?
              I'd stick with one problem at a time until you get it fixed. The AIS is a 20 minute job on a running bike. It's my opinion that there is nothing wrong with the valves. I'd guess you had some sort of spark issue. But since you have it torn down. you can go ahead and replace the valve seals and clean the combustion chamber of carbon and try checking for a valve leak. If there is no sign, reassemble and get the bike back to the way it was when the situation started. That way were not misdiagnosing a new problem.

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              • #48
                Smokkeybear did you see the video where it was pushing compression out of the carb?

                https://redirect.viglink.com/?format...46345536730%2F

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                • #49
                  Originally posted by davej View Post
                  Smokkeybear did you see the video where it was pushing compression out of the carb?

                  https://redirect.viglink.com/?format...46345536730%2F
                  Ok,I'm just thinking out loud but I think we may be looking at the wrong jug. If I'm seeing correct, the pulse of gas shooting out is on the exhaust stroke of the jug that is running. Check the other cylinder. If it is blowing back while the other jug has no spark, then you can get a push from the carb like that.

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                  • Bikerron
                    Bikerron commented
                    Editing a comment
                    More like it’s getting a pulse off a compression stroke back through a hung intake valve and out the carb.

                • #50
                  Upon further research. I found that your bike opens the exhaust valves at startup a bit to help overcome the compression (easier starting). I believe if you check the solenoid that controls that, you may see that this is what is happening. I think you have lost spark to that one cylinder and this decompression is shooting the available fuel in the manifold back through the carb.

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                  • #51
                    Operative word on decompression is that it momentarily lifts the exhaust valve tappet to dump compression out the exhaust valve and into the exhaust port. It’s all about building some kinetic energy into that 45 pound crankshaft so it can swing through the next compression stroke with some authority.

                    Normally, the intake valve would be closed in this sequence so there wouldn’t be anything flowing back into the intake.

                    Only a hung intake valve could allow that on the compression stroke.


                    Me: Old, but not obsolete.
                    The bike: Timeless.

                    Hit my LIKE button, dammit!

                    Never let the truth spoil a good story.

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                    • #52
                      With liquid sitting on top of the valves I'm trying to think of anything. Maybe it has jumped time? That would open the intake valve at the wrong time and send the compression back through the intake?

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                      • #53
                        It can't jump time. It is a gear system and nothing to jump. The liquid was intentionally put the to look for leakage

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                        • #54
                          No way these gears are gonna jump time.

                          Chain, maybe, but not these honkers.


                          Me: Old, but not obsolete.
                          The bike: Timeless.

                          Hit my LIKE button, dammit!

                          Never let the truth spoil a good story.

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                          • #55
                            Putting the cams in out of synch is the only way to jack that up.


                            Wherever you go in life, ride there if at all possible.

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                            • #56
                              Originally posted by davej View Post
                              It can't jump time. It is a gear system and nothing to jump
                              Push rod? lifter? anything other than the valve itself that would hold it open on the compression stroke?

                              Comment


                              • #57
                                What else could hold open the intake valve during the compression stroke, lifter? push rod? If both valves are seating, it has to be an issue of the intake valve being open at the wrong time.

                                Comment


                                • #58
                                  My thought is that ,that head needs to be brought to a machine shop and be properly checked for a bent or warped valve. It kinda holds the thick liquid but still leaks. It shouldn't leak at all. When that is under the pressure of a 9.3:1 piston I think the leak would increase to what we see in the video. The problem started after what sounds like an overheat situation sitting in traffic @ 90º temps.It would be easy to say if we were there to see the thing in person, but we are not so it needs to go get checked by a machine shop to make the proper determination of bad or not. JMO

                                  Comment


                                  • #59
                                    Most service manuals have you check a valve seat for leaks with fuel or solvent. None should permeate. It doesn’t seem like it would leak that much but like Dave said, compression makes a LOT of difference.


                                    Wherever you go in life, ride there if at all possible.

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                                    • #60
                                      Since you have the heads off, pull the valves inspect the valve guides and the stems. If they are good, then lap the valves and inspect the seats. If one is bent, it will show it's ugly face. If your not sure how to do this, then take it to the machine shop.

                                      Comment


                                      • Littlebull
                                        Littlebull commented
                                        Editing a comment
                                        Sounds like a good plan

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