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1948 Indian Scout,74 CI. Anyone familiar with maintenance?????

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    #1

    1948 Indian Scout,74 CI. Anyone familiar with maintenance?????

    So I have a lucky friend whose better half agreed to the purchase of a 48 Indian Chief. The bike has just been freshly rebuilt. He has about 275 miles on the motor after the rebuild. I haven't seen it yet but hope to this week. I will get the particulars of what was done and post them but the reason I am getting involved is because the motor is running extremely hot and from what the guy says, poorly. Those two go hand in hand.

    Going through my head are the following things to check:

    valve clearances---I have no idea how though on a side valve engine?? Any help appreciated..

    Air leaks around the intake side of the manifold. Only one carb, how hard could that be!!!

    Exhaust leaks--

    Carb adjustment--Too lean??

    Cylinder heads too loose or not torqued properly..

    What else would one want to check that might be a contributing factor? My knowledge base is inline fours and twins. I understand all the principals but I do not have a bunch of experience on V twin motors. Kind of excited to see how it all works.

    He has a rider manual form back in the day that he says goes over the maintenance as well as a service manual. I have not seen either, yet.

    Any advice and comments welcome. And yes I will post pics when I can get them.

    Thanks
    GS Score Card
    4-400 Series GS's
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    2-1100 series 1982 GS1100G In stable now
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    #2
    The manual will be pretty comprehensive. I'd initially suspect ignition timing, it's easy to set it at full advance but the mag retarded...which gives too much advance when the spark control is moved.
    I'd also ask about the rebuild. who bored it if it was rebored, what pistons were used....

    Comment

      #3
      do you have a link to a procedure for this so I might be able to study up before I see it?

      Too much advance in timing sounds very possible. Symptoms are there. Thanks!
      GS Score Card
      4-400 Series GS's
      3-500 Series
      1-600 Series
      1-700 Series
      4-800 Series
      1-1000 Series
      2-1100 series 1982 GS1100G In stable now
      sigpic

      Comment

        #4
        Originally posted by jimfj View Post
        do you have a link to a procedure for this so I might be able to study up before I see it?

        Too much advance in timing sounds very possible. Symptoms are there. Thanks!
        No link sorry, All my info is paper...If you can find a copy, Modern Motorcycle Mechanics by J R Nicholson which is a Canadian published book covers the big Indians pretty well. Mine's the sixth edition, 1969 and the Indian info is still in there at that date.

        Comment

          #5
          Do a google search..plenty of downloadable service manuals out there.
          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

            #6
            Check out the http://www.jockeyjournal.com/forum/forumdisplay.php?f=2
            1984 GS550ES
            Rebuild in progress....

            1983 GS750ES
            4700 miles

            1978 GS1000E...Resto-mod to come

            Comment

              #7
              I went to see the bike over the weekend and again, sorry for no pictures, but it is really pretty.

              My friend put on an electronic ignition and we tried to start it. Found out he forgot to put the rotor on the dizzy. Tried again and it would pop but not fire. it kept spitting out of the carb. Started smelling like fuel so we turned the petcock off and started to check the timing.

              I found that the rotor shaft would move, about 15 degrees of play, when i tried to gently turn it. This would negate all almost all of the dizzy advance or retard. Dug a little deeper and found out that the slot that the rotor shaft fits into was wallowed out on the ends and that the bottom of the shaft (think flathead screwdriver blade) was worn as well.

              Found the timing mark on the flywheel and looked to see how the rotor lined up with the electrode for the plug in the cap. Looked about right but if you account for the slop in the shaft it can change things alot. Would this have a huge bearing on starting and running??

              We finally put everything back and tried to fire it again. It started and ran but only fully advanced. if we gave it throttle or retarded the timing it quit and wouldn't start.
              GS Score Card
              4-400 Series GS's
              3-500 Series
              1-600 Series
              1-700 Series
              4-800 Series
              1-1000 Series
              2-1100 series 1982 GS1100G In stable now
              sigpic

              Comment

                #8
                Seems like the 'rebuilder' was a chimp.
                ---- Dave

                Only a dog knows why a motorcyclist sticks his head out of a car window

                Comment

                  #9
                  Used to be a place out in Arizona ( i think it was ) that was a huge warehouse of 30s and 40s Harley stuff. Some Indians too as I recall. Used to have an add in the back of Easy Rider. Maybe go to get a copy and look thru the classifieds in the back. May still be there and youll have a parts source.
                  Last edited by chuck hahn; 01-02-2016, 11:35 AM. Reason: correct typos
                  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

                    #10
                    If it gets hot running, the spark is retarded, makes for an easier start but bad for when its going, after you'd rebuilt it and would only run full 'advanced' then you have a timing issue for sure. you need a *** paper and a wire through the plug hole to know where the piston and fire point is. I bet you're close but going the wrong way with your adjustment and it sounds like you're a tooth out on timing. get us some pictures.
                    sigpic

                    Don't say can't, as anything is possible with time and effort, but, if you don't have time things get tougher and require more effort.

                    Comment

                      #11
                      What's up with the damn spell checker? *** paper is normal speak. Cigarette paper.
                      sigpic

                      Don't say can't, as anything is possible with time and effort, but, if you don't have time things get tougher and require more effort.

                      Comment

                        #12
                        Originally posted by tatu View Post
                        What's up with the damn spell checker? *** paper is normal speak. Cigarette paper.
                        It's not the spell checker, it's the nanny filter. That word might be 'normal speak' for cigarette paper,
                        but it's also considered to be a derogatory term for gays, therefore it's not allowed.
                        If you're not living on the edge, you're taking up too much space.

                        Comment

                          #13
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