Can I use Yamabond on half moon's

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  • Quick Cal
    • Feb 2026
    #1

    Can I use Yamabond on half moon's

    I'm doing my valve's on my 650. The service guy at my local dealer said to use some Yamabond on them. The part's guy said he has always put them in dry. No sealer needed. But when I told him the service guy said to use Yamabond, he sold me some Yamabond #4. It says it is "semi drying". Is this something that I want to use. If not, what do you recommend. Thanks.
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    • rustybronco
      Forum LongTimer
      Bard Award Winner
      GSResource Superstar
      Past Site Supporter
      • Jul 2005
      • 14961
      • Marysville, Michigan
      #2
      I use threebond 1104 (or 1194) on them. it appears to be the same as yamabond #4 from what I can find.
      De-stinking Penelope http://thegsresources.com/_forum/sho...d.php?t=179245

      http://www.thegsresources.com/_forum...35#post1625535

        Comment

        • 1980GS1000E
          Forum Sage
          Past Site Supporter
          • Aug 2007
          • 1665
          • San Diego, California, USA
          #3
          Yamabond will only work on Yamahas.
          Current Rides: 1980 Suzuki GS1000ET, 2006 H-D Fatboy, 2021 BMW K1600B

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            • Guest
              #4
              Originally posted by 1980GS1000E
              Yamabond will only work on Yamahas.
              Actually laughed out loud!

              I use Honda oil in a Yamaha..

              The last moons I did didnt get any "sealer" at all.
              But they were new. Not sure if that has anything to do with it.
              The used ones on the 850 leak, no sealer.

                Comment

                • Quick Cal
                  #5
                  The main thing I'm worried about here is it says it's "SEMI DRYING". That sounds kinda like something that shouldn't be mixing with my oil. But what the hell. I'm goin for it.

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                    • koolaid_kid
                      #6
                      You won't harm anything, and it is fairly easy to remove when you go to change the valve cover gasket.

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                        • Guest
                          #7
                          I use a thick loogie.

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                            • BassCliff
                              #8
                              Originally posted by chef1366
                              I use a thick loogie.
                              C'mon guy! You made me snort pizza outta my nose!

                              I usually use a thin smear of gasket sealer on the curved part of the half-moons. This last bunch I installed with the lip on the inside. Since I use a Real Gasket, I tapped them into the head with a small hammer and a straight piece of wood to seat them a little.

                              Thank you for your indulgence,

                              BassCliff

                                Comment

                                • JEEPRUSTY
                                  #9
                                  Originally posted by Quick Cal
                                  I'm doing my valve's on my 650. The service guy at my local dealer said to use some Yamabond on them. The part's guy said he has always put them in dry. No sealer needed. But when I told him the service guy said to use Yamabond, he sold me some Yamabond #4. It says it is "semi drying". Is this something that I want to use. If not, what do you recommend. Thanks.
                                  Only on full moons and then only if you are very hairy.
                                  Permatex black works well and is easily removed.

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