GUnk engine cleaner .. safe?

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  • Boriqua
    • Mar 2026

    #1

    GUnk engine cleaner .. safe?

    Now that my bike is starting and running reliably I am on to other things.. I need new sprockets and chain and I have some other adjustments but by and large .. I am looking to dress it up a bit. There is some spudge on my engine. Not bad but enough that it annoys me. There seems to be paint on the engine. Would it be safe to hit it with some gunk engine cleaner and then hose it off or will it bubble and peal whatever appears to be on the engine. I figure any cleaning I can do will help it run cooler in this hellish weather also.
    alex
  • chuck hahn
    Forum LongTimer
    Past Site Supporter
    • May 2009
    • 25951
    • Norman, Oklahoma

    #2
    Suzuki actually makes thier own engine degreaser..should be at any dealership. Or it wont take long for them to get some in.

    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.

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    • Nessism
      Forum LongTimer
      GSResource Superstar
      Past Site Supporter
      Super Site Supporter
      • Mar 2006
      • 35808
      • Torrance, CA

      #3
      Gunk is pretty safe. If the paint is loose and flaky it may come off but other than that it won't hurt anything. The citrus version Gunk stinks a whole lot less than the regular stuff which has a strong petroleum smell.
      Ed

      To measure is to know.

      Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

      Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

      Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

      KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

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      • Cipher
        Forum Sage
        • Mar 2016
        • 3129
        • Toronto Ontario

        #4
        I read years ago theres a sulphur content issue with some degreasers
        read msds maybe?
        sulphur plus water is H2SO4
        1983 GS 550 LD
        2009 BMW K1300s

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        • bonanzadave
          Forum Guru
          Past Site Supporter
          Super Site Supporter
          • Jul 2006
          • 9624
          • Minnesota

          #5
          Get a little bristle brush and some simple green. Hose it off thoroughly.
          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

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          • storm 64
            Forum Sage
            Past Site Supporter
            Super Site Supporter
            • May 2012
            • 4610
            • Youngstown,Ohio

            #6
            I've been using Gunk Engine Brite for years. It never affected the paint. Spray it on, scrub, wash it off. Repeat as nessasary... 👍
            My Motorcycles:
            22 Kawasaki Z900 RS (Candy Tone Blue)
            22 BMW K1600GT (Probably been to a town near you)
            82 1100e Drag Bike (needs race engine)
            81 1100e Street Bike (with race engine)
            79 1000e (all original)
            82 850g (all original)
            80 KZ 650F (needs restored)

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            • gbw
              Forum Sage
              Past Site Supporter
              • Nov 2007
              • 2262
              • Murfreesboro TN

              #7
              I had pretty good luck with Simple Green and a toilet brush on my old 750. It was never perfect but it was better. I bought a toilet brush specifically for that purpose. Didn't really want to employ a used one

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              • JJ

                #8
                Originally posted by bonanzadave
                Get a little bristle brush and some simple green. Hose it off thoroughly.
                That's what I do. Simple green Pro - the purple stuff from Home Depot. Either rinse with a pressure washer using just water, or take it to a car wash for rinsing.

                Comment

                • Brendan W
                  Forum Sage
                  Past Site Supporter
                  • Jul 2013
                  • 4931
                  • Wexford, Ireland

                  #9
                  Originally posted by gbw
                  I had pretty good luck with Simple Green and a toilet brush on my old 750. It was never perfect but it was better. I bought a toilet brush specifically for that purpose. Didn't really want to employ a used one
                  We bought one of those toilet brushes. Took less than a week for the whole family to insist we went back to paper.
                  97 R1100R
                  Previous
                  80 GS850G, 79 Z400B, 85 R100RT, 80 Z650D, 76 CB200

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                  • Guest

                    #10
                    Originally posted by Brendan W
                    We bought one of those toilet brushes. Took less than a week for the whole family to insist we went back to paper.
                    That just made my morning.

                    Comment

                    • JJ

                      #11
                      Originally posted by Brendan W
                      We bought one of those toilet brushes. Took less than a week for the whole family to insist we went back to paper.
                      I almost sprayed a mouthful of coffee on the monitor. Thanks for the laugh!

                      Comment

                      • gbw
                        Forum Sage
                        Past Site Supporter
                        • Nov 2007
                        • 2262
                        • Murfreesboro TN

                        #12
                        Originally posted by Brendan W
                        We bought one of those toilet brushes. Took less than a week for the whole family to insist we went back to paper.
                        Yeah, I don't care who you are. That right there is funny

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                        • 1948man
                          Forum Sage
                          Past Site Supporter
                          • May 2009
                          • 4660
                          • Florida

                          #13
                          Originally posted by Brendan W
                          We bought one of those toilet brushes. Took less than a week for the whole family to insist we went back to paper.
                          I once bought some John Wayne Toilet Paper. It was rough and tough and didn't take any $hit off anybody.
                          1983 GS 1100 Guided Laser
                          1983 GS 1100 G
                          2000 Suzuki Intruder 1500, "Piggy Sue"
                          2000 GSF 1200 Bandit (totaled in deer strike)
                          1986 Suzuki Cavalcade GV 1400 LX (SOLD)

                          I find working on my motorcycle mildly therapeutic when I'm not cursing.

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                          • gbw
                            Forum Sage
                            Past Site Supporter
                            • Nov 2007
                            • 2262
                            • Murfreesboro TN

                            #14
                            Originally posted by Brendan W
                            We bought one of those toilet brushes. Took less than a week for the whole family to insist we went back to paper.
                            I think you're doing it wrong

                            Comment

                            • Allie
                              Forum Guru
                              • May 2010
                              • 7682
                              • New Jersey

                              #15
                              LoLoLoL Dpep you scamp you. I like Simple Green, great stuff!
                              "Men will never be free until Mark learns to do The Twist."

                              -Denis D'shaker

                              79 GS750N

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