Marvel Mystery Oil & Race Motor

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  • Kyler
    • Feb 2026

    #1

    Marvel Mystery Oil & Race Motor

    So, has anyone used MMO in a race bike regularly?

    I use MMO in my old worn out 94 Chevy truck to quiet the lifters. Over a few beers, it occurred to me that if it penetrates that well, maybe I should use it in my race motor to help prevent cam galling.

    thoughts?
  • Guest

    #2
    I would not use it with the wet clutch.

    Comment

    • chuck hahn
      Forum LongTimer
      Past Site Supporter
      • May 2009
      • 25918
      • Norman, Oklahoma

      #3
      There have been many many discussions about Marvels in the GS engines. None that I recall have mentioned any clutch problems with its use. In fact, as I recall things, It quite the opposite. It supposedly cleans the plates and fibers exceptionally well and the clutch seems to lock up more positively and reduces slippage.

      Here is the list of threads I got from typing in Marvels Mystery Oil in the search box. Scan them and find the info there is my suggestion.


      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

      • bonanzadave
        Forum Guru
        Past Site Supporter
        • Jul 2006
        • 9623
        • Minnesota

        #4
        Ive seen Marvel swell rubber o-rings if that matters.

        Is it going OT to mention any other oil additives ? Too bad . We love Sea Foam in the gas....how about the oil ?
        82 1100 EZ (red)

        "You co-opting words of KV only thickens the scent of your BS. A thief and a putter-on of airs most foul. " JEEPRUSTY

        Comment

        • chuck hahn
          Forum LongTimer
          Past Site Supporter
          • May 2009
          • 25918
          • Norman, Oklahoma

          #5
          See the second post here. Maybe a little and run it maybe 10 or 20 miles and then change the oil ??

          In any case, they do have a "HOWEVER" clause in the second response. Do some more searching. I will see if I can find the manufacturers application suggestions too.


          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

          • Kyler

            #6
            I guess I'll side with caution and not use it.

            Comment

            • chuck hahn
              Forum LongTimer
              Past Site Supporter
              • May 2009
              • 25918
              • Norman, Oklahoma

              #7
              More info and has a CONTACT selection as well..Look at the FAQ section where they say you can add to motorcycle engines. granted it doesnt say wet clutch but ask then directly what their summation is.


              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

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