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Running in new engine techniques

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    #16
    I'd ask the guy who built the engine, but it sounds like he might not be available...?

    For me, it's more about managing the risks of part failures or assembly errors. A slightly different set of priorities than they had back in disco era Hamamatsu.

    Out of something akin to paranoia, I usually change the oil at about 50 miles just to look for excessive sparklies and chunks (some sparklies and bits on the drain plug magnet are perfectly normal, of course). Then do the next at around 500 miles, then oil changes as normal after that.

    And yes, ordinary riding and heat cycling, load and unload the rings, don't lug it. A varied and healthy diet of load and RPM. Maybe avoid hours of droning at the same RPM, so maybe don't set off on an Iron Butt ride right away. Check the oil frequently in case it's using more oil than expected, or springs a leak. I don't know that I'd spin a fresh build to redline right away, but once you've done that first oil change and all seems well, zing away.

    The sticker the Suzuki factory placed on the tach advised avoiding redline for the first 600 miles. I don't think that level of restraint is really necessary. And the speed/RPM shift points given in the manual are ridiculously low, so ignore that.
    Last edited by bwringer; 11-22-2020, 10:41 AM.
    1983 GS850G, Cosmos Blue.
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      #17
      OK . 20m done as per method.
      No leaks whatsoever.
      Thanks for answers.
      (now I gota fix my original engine
      that compared to this one has been butchered.)
      UKJULES
      ---------------------------------
      Owner of following bikes:
      1980 Suzuki GS550ET
      1977 Yamaha RD 250D
      1982 Kawasaki GPZ 750 R1
      1980 Suzuki GSX 250E

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        #18
        Just as in normal (post-breakin) running, lugging will likely do more harm than over revving.

        The absolute safest breakin? According to the owner's manual. Here's Cycle World's reasoning:

        New motorcycles are under warranty. The owner's manual instructions will result in the fewest warranty-covered repairs.
        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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          #19
          Cycle World's test was for a brand new engine. Not a used engine where someone lapped the valves and honed a used cylinder. For that some additional cylinder pressure helps the ring seal.
          Ed

          To measure is to know.

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            #20
            This is a good video:

            "Thought he, it is a wicked world in all meridians; I'll die a pagan."
            ~Herman Melville

            2016 1200 Superlow
            1982 CB900f

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              #21
              Tis fascinating .
              I am going for the mid way .... basically what said on here.
              assertive town driving style after engine warm.
              engine braking and not being sluggish on engine.
              and gradually building up.

              [I must do a compression test tomorrow for analysis)

              be good to compare to my old engine test )

              Dont think there is anything terrible wrong with it
              bar a lack of care (due to time) when doing a previous
              top end rebuild ... stripped threads , gaskets in poor state
              and I recall lapping valves myself .
              but it worked and works now ! just had an oil leak.
              UKJULES
              ---------------------------------
              Owner of following bikes:
              1980 Suzuki GS550ET
              1977 Yamaha RD 250D
              1982 Kawasaki GPZ 750 R1
              1980 Suzuki GSX 250E

              Comment


                #22
                Interesting. Like he said, improved metallurgy. Also like he said, it wasn't tested on a high performance engine.

                Question: Are new rings, even pistons considered a 'top end' job?
                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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                  #23
                  70 miles and 3 heat cycles running it in done.
                  (wet and cold here in uk now!)
                  Used method on here (assertive town riding and engine breaking)
                  Will gradually increase from now and chuck oil
                  at 500m and check valves and re torque.

                  no issues, no leaks , re torqued head to spec.
                  More power than old engine.

                  [over xmas I'll pull to bits the old engine
                  but take readings as I do , as I wanna know
                  what is wrong with it] look forward to that as
                  xmas reading.
                  UKJULES
                  ---------------------------------
                  Owner of following bikes:
                  1980 Suzuki GS550ET
                  1977 Yamaha RD 250D
                  1982 Kawasaki GPZ 750 R1
                  1980 Suzuki GSX 250E

                  Comment


                    #24
                    Very cool, Jules. I like your attitude.
                    "Thought he, it is a wicked world in all meridians; I'll die a pagan."
                    ~Herman Melville

                    2016 1200 Superlow
                    1982 CB900f

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                      #25
                      No need for books to read or films to watch over xmas period
                      as daily there will be updates on the old engine
                      renovation ... by someone who has never split
                      a crankcase before.

                      I can barely wait to start the novel .

                      I can foretell it will be rings , gaskets
                      and poss stripped threads not allowing
                      correct torque.
                      the main issue top end.
                      I refuse to believe I ballsed up the valves .
                      UKJULES
                      ---------------------------------
                      Owner of following bikes:
                      1980 Suzuki GS550ET
                      1977 Yamaha RD 250D
                      1982 Kawasaki GPZ 750 R1
                      1980 Suzuki GSX 250E

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