Compression test values...1100e

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  • Guest
    #1

    Compression test values...1100e

    Still waiting on that flywheel puller to take care of the loose starter clutch bolts so in the mean time its cleaning up 15 years of it sitting under a tarp.
    So....ran a compression test just now. Engine is unfortunately cold but so be it for now. Throttle wide open on a cold motor brought said results #1-125psi, #2-135psi, #3-135psi and #4-155psi. Havent even looked at valve adjustment yet but what are thoughts on these numbers? 1981 GS1100e
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    • Grimly
      Forum Guru
      Past Site Supporter
      Super Site Supporter
      • Sep 2012
      • 5764
      • Ireland
      #2
      For a cold engine that's been sitting for years, those figures aren't bad at all, and it's likely the differences are down to valve clearances and slightly stuck rings / or dry bores.
      Dave
      '79 GS850GN '80 GS850GT
      Only a dog knows why a motorcyclist sticks his head out of a car window

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        • Guest
          #3
          Thanks for the feedback Grimly! I ran through them a second time and only change was I got #3 up from 135 to 140. I will get to a valve check/adjustment after I get the puller, inspect starter clutch, replace and tighten/locktite loose bolts and fire it up to hopefully hear zero noise.
          In the mean time I'm having fun with 0000 steel wool and chrome polish. With some elbow grease this bike is shaping up to be a looker. What a cool classic rider this thing is looking to be.

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            • chuck hahn
              Forum LongTimer
              Past Site Supporter
              • May 2009
              • 25918
              • Norman, Oklahoma
              #4
              Dribble maybe 2 tablespoons of Marvels Mystery Oil into each jug and by the time you get that rotor off and do valves the sauce will have cleaned all carbon from the ring grooves. Fire it up outside until it stops smoking from oil burn off. The oil wont hurt engine oil so its all a win win. Ride it a bit at highway speeds and then recheck those numbers..they should easily go up.
              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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                • Guest
                  #5
                  Thank you Chuck...I'll do it!
                  What numbers would be respectable for an 81' 1100 with 19,388 miles on the clock?

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                    • Rob S.
                      Forum Guru
                      Past Site Supporter
                      • Dec 2013
                      • 9393
                      • New York City
                      #6
                      I agree the numbers sound pretty good. Could we see a picture of the bike?
                      1982 GS1100E V&H "SS" exhaust, APE pods, 1150 oil cooler, 140 speedo, 99.3 rear wheel HP, black engine, '83 red

                      2016 XL883L sigpic Two-tone blue and white. Almost 42 hp! Status: destroyed, now owned by the insurance company. The hole in my memory starts an hour before the accident and ends 24 hours after.

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                        • Guest
                          #7
                          These pics were after I gave it a bath the other day. It was buried in layers of grease and oil. In the short moments it was running the top end was weeping oil in various areas so there will be some new gaskets and orings to install here and there.
                          Right now I have the tank and other bits removed going after the chrome with 0000 steel wool and chrome polish, it's coming around cosmetically quite nicely so far.
                          https://i.imgur.com/lNrgUUx.jpg

                          https://i.imgur.com/CUzICy7.jpg

                          https://i.imgur.com/H1N8i4u.jpg

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                            • Guest
                              #8
                              This was the pic on the Craigslist ad, turns out it was a pic BEFORE it was parked outside under a tarp for 15 years lol
                              https://i.imgur.com/AY4hB4C.jpg

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                                • Guest
                                  #9
                                  I apologize for the pics coming across as a link you have to click on. Trying to figure out how to simply post a pic without link.
                                  Anyhow this is actually how the bike look when I showed up to see it.
                                  https://i.imgur.com/eDiBHQ3.jpg


                                  Even in that state and not knowing how easy it would be to get it to rider status I felt good about getting it for $300. Feeling even better now...

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                                    • Guest
                                      #10
                                      My 78 1000 had been sitting uncovered out side for nearly 22 years when I got it, 13000, miles on it cleaned it up, did typical maintenance. After I started riding it did a compression check, had 170 across the board. It had bad valve seals though, so I rebuilt it and installed a 1084 top end using 1100 cylinders and head. Still have the original top end just needs valve seals

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