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Carb's-Eye View into Engine: Can it be Cleaned?

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    #16
    Originally posted by Doug650L View Post
    Hi everyone! My Memorial Day project consists of replacing the o-rings (thanks Cycle O-Rings) at the engine intakes. Upon removing the ports, there is noticeable "gunk" visible. Since the oil is out of the engine already, is there a treatment, flush or spray I should use to get rid of it?
    Did you fix the problem? could be a leaking valve seat and/or seals, or bad valve adjustment to tight, or bad cam timing.
    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

    Comment


      #17
      Originally posted by Nessism View Post
      Leave it alone and ride. Carbon like that won't hurt anything. Maybe some Seafoam (or similar) in the next few tanks. Trying to clean it off will just flush some down into the engine where no good will come.
      Agreed. This is completely normal buildup on these engines. Don't monkey with it.

      Even if you managed to clean it up with an assortment of dental tools, curved q-tips, and advanced laparoscopic surgery techniques, it wouldn't matter -- the carbon would be back in a few thousand miles.
      1983 GS850G, Cosmos Blue.
      2005 KLR685, Aztec Pink - Turd II.3, the ReReReTurdening
      2015 Yamaha FJ-09, Magma Red Power Corrupts...
      Eat more venison.

      Please provide details. The GSR Hive Mind is nearly omniscient, but not yet clairvoyant.

      Celeriter equita, converteque saepe.

      SUPPORT THIS SITE! DONATE TODAY!

      Co-host of "The Riding Obsession" sport-touring motorcycling podcast at tro.bike!

      Comment


        #18
        Originally posted by bwringer View Post
        Agreed. This is completely normal buildup on these engines. Don't monkey with it.

        Even if you managed to clean it up with an assortment of dental tools, curved q-tips, and advanced laparoscopic surgery techniques, it wouldn't matter -- the carbon would be back in a few thousand miles.

        Am I missing something how is that normal to have carbon build up on the intake valve it should remain clean



        .
        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

        Comment


          #19
          No...they dont all stay clean because it too is in the combustion chamber...subjected to the same things the exhaust valves are. What good for one is good for the other.

          Anyway, I swear to you that the water squirting will instantly knock the crap off all the valves and the tops of the pistons..clean.
          MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
          1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

          NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


          I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

          Comment


            #20
            Originally posted by chuck hahn View Post
            No...they dont all stay clean because it too is in the combustion chamber...subjected to the same things the exhaust valves are. What good for one is good for the other.

            Anyway, I swear to you that the water squirting will instantly knock the crap off all the valves and the tops of the pistons..clean.
            Could you also use an oral syringe and push, IDK, 10ml's of water through the vacuum port? A friend uses that Seafoam Spray and he just takes the vacuum cap off (one at a time) on his Yammy and gives her a few squirts. I have never tried it. Is there any reason water through the vacuum port would not work?

            Comment


              #21
              Opening the vac port makes a massive vacuum leak..and since your introducing water its gonna want to stall and your gonna have to ramp up the throttle so it doesnt stall already. So, your gonna need a 1 hand method to inject the water and 1 hand for the grip. This is why a squirt gun or water bottle works perfectly.

              First time i saw this done to an engine was on my 90 S10. Guy was working the bottle and the throttle lin kage and he told me to go watch the exhaust pipe. Solid black stream of crap came out. Guy was a big time engine builder that worked for some racing company. They built engines and tested them till the imploded for some Nascar team. I cant recall what team though.

              My friend Rob Fischer knew him andm hooked us up. Truck ran way better after the "flush" as it were.
              MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
              1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

              NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


              I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

              Comment


                #22
                Personally I would rather have vapor going through my engine rather than liquid. A spray bottle is going to send a mist and it will be that much easier for the engine to turn it into steam. I recently did this on a 440 dodge mtr home and reved to about 2500 and it would take as much as I wanted spray down the open carb. No issues.

                Comment


                  #23
                  Originally posted by stetracer View Post
                  Am I missing something how is that normal to have carbon build up on the intake valve it should remain clean



                  .

                  It's normal as in "they all look like that" after a few thousand miles of street use. The buildup seems to be self-limiting at about the thickness shown in the photo if mixture is in the ballpark.

                  If a little normal carbon buildup bugs you that much, have fun disassembling your engine every other weekend...
                  1983 GS850G, Cosmos Blue.
                  2005 KLR685, Aztec Pink - Turd II.3, the ReReReTurdening
                  2015 Yamaha FJ-09, Magma Red Power Corrupts...
                  Eat more venison.

                  Please provide details. The GSR Hive Mind is nearly omniscient, but not yet clairvoyant.

                  Celeriter equita, converteque saepe.

                  SUPPORT THIS SITE! DONATE TODAY!

                  Co-host of "The Riding Obsession" sport-touring motorcycling podcast at tro.bike!

                  Comment


                    #24
                    Use the redline now and then.
                    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


                      #25
                      Originally posted by mrbill5491 View Post
                      Use the redline now and then.
                      As a lower limit. It's a GS, it's OK.
                      http://img.photobucket.com/albums/v5...tatesMap-1.jpg

                      Life is too short to ride an L.

                      Comment


                        #26
                        I remembered the guys name that did it to my truck...John Schell.
                        MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
                        1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

                        NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


                        I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

                        Comment


                          #27
                          Originally posted by bwringer View Post
                          It's normal as in "they all look like that" after a few thousand miles of street use. The buildup seems to be self-limiting at about the thickness shown in the photo if mixture is in the ballpark.

                          If a little normal carbon buildup bugs you that much, have fun disassembling your engine every other weekend...
                          I do have fun building motors

                          That much black slug build up is not right. The valve guild seals have to be leaking and cooking oil on his valves. Anybody that thinks that is normal is not thinking right. Just think about the amount of weight your adding to your valves. This problem should be corrected.

                          Here is a few thousand miles of use close to 10,000 miles this head was last done in 2000 it is a 85 GS1150E
                          Last edited by stetracer; 06-01-2013, 07:32 PM.
                          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

                          Comment


                            #28
                            Originally posted by chuck hahn View Post
                            No...they dont all stay clean because it too is in the combustion chamber...subjected to the same things the exhaust valves are. What good for one is good for the other.

                            Anyway, I swear to you that the water squirting will instantly knock the crap off all the valves and the tops of the pistons..clean.

                            yep water will clean them right up fast.
                            But I would not do it in this case as there is quite a bit of build up. If he doesn't have the $$ to fix it right now I would use something that will dissolve it slower maybe it would be less likely to come off in big chunks
                            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

                            Comment

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