78XS rehab

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  • ronniy
    New
    • Oct 2020
    • 2

    #106
    where do you get the 4 into 1 exhaust for 1981 xs1100 cant find anythin on internet

    Comment

    • jetmechmarty
      Master of XSology
      • Nov 2003
      • 7768
      • Coldwater, Mississippi

      #107
      Originally posted by ronniy
      where do you get the 4 into 1 exhaust for 1981 xs1100 cant find anythin on internet
      Mac was the last. They're showing NLA now.
      Marty (in Mississippi)
      XS1100SG
      XS650SK
      XS650SH
      XS650G
      XS6502F
      XS650E

      Comment

      • ronniy
        New
        • Oct 2020
        • 2

        #108
        Does anyone know where to get a 4 into one exhaust system I’ve seen picture but can find where to buy thanks

        Comment

        • FJ111200
          XStremely XSive
          • Oct 2007
          • 317
          • Crewe, Cheshire, UK

          #109
          There are two types available here > https://predatormotorsport.co.uk/YAM...HED-STAINLESS/ or at least there was when i last looked.
          I 'm after one fpr mine when the time comes.

          Comment

          • Eab
            XSive
            • Sep 2020
            • 60
            • Rhode Island

            #110
            Got plates! It's raining the last few days, but itching to get this on the road. I haven't rebuilt the carbs, I'm planning on doing some plug reading to see where I stand. I realize it's likely it needs SOME carb work, but if it's running rich or lean, does that risk damage to the engine? I know there are downsides in economy and performance depending, but I want to get in some miles before it's too cold. My two-stroke experience suggests its not a risk, but I'd like to be sure. As it stands now, it goes from cold to idle on half-choke pretty easily, with RPMs hovering around 1K (immediately after a cold start). I believe I read that specs call for an 1100rpm idle so I'm pretty comfortable with where I am.

            Comment

            • bikerphil
              Master of XSology
              • Jan 2008
              • 8635
              • South Flori-DUH

              #111
              Engine damage could occur if running extremely lean, rich won't hurt anything unless raw fuel is actually dumping into the crankcase. Does the bike idle at all with the enricher (choke) off?
              2H7 (79) owned since '89
              3H3 owned since '06

              "If it ain't broke, modify it"

              ☮

              Comment

              • Eab
                XSive
                • Sep 2020
                • 60
                • Rhode Island

                #112
                Originally posted by bikerphil
                Engine damage could occur if running extremely lean, rich won't hurt anything unless raw fuel is actually dumping into the crankcase. Does the bike idle at all with the enricher (choke) off?
                Not cold it doesn't, at least. I've only ever taken it around the block (4 minutes) and/or idled it for maybe 2 minutes in the driveway. I assume it'd take a bit more running than that to run with zero enrichment?

                Comment

                • bikerphil
                  Master of XSology
                  • Jan 2008
                  • 8635
                  • South Flori-DUH

                  #113
                  Yeah, probably need to warm it up more before no enricher is needed. Ride it some and let us know how it goes.
                  2H7 (79) owned since '89
                  3H3 owned since '06

                  "If it ain't broke, modify it"

                  ☮

                  Comment

                  • Bax
                    XStremely XSive
                    • Jan 2016
                    • 344
                    • Merrimack, NH

                    #114
                    Hi Eab, I wouldn't be too concerned with the bike needing richining to idle while cold. The idle didn't sound too bad in the video. ---Bax
                    80 SG, --- Slightly modified with EFI.....

                    Comment

                    • Eab
                      XSive
                      • Sep 2020
                      • 60
                      • Rhode Island

                      #115
                      Got the new turn signals in today! Something's up though: the left signal is on (no blinking) when the key is turned to on and the turn switch is disabled. Right blinker engages and flashes as it should, but when I hit the left signal it just becomes slightly brighter with no flash. I'm thinking its possible I swapped some wires in the tail light, any theories? I've got my wiring diagram ready to roll but I figure its likely someone else has had this same issue in the past. Hoping anyway!

                      Sidenote: neither turn signal is LED

                      Update: I switched the ground in the tail light housing around and it's not always on anymore, still won't blink though. Closer!

                      Another update: fixed it!
                      Last edited by Eab; 10-31-2020, 02:59 PM.

                      Comment

                      • 2WheelFun
                        XStremely XSive
                        • Aug 2020
                        • 266
                        • Pittsburgh PA

                        #116
                        Was it just cleaning up the grounds that fixed it?
                        1979 XS1100 Special
                        1980 XS1100 Std parts bucket
                        1987 ZL1000 Eliminator
                        1976 XS750D Project in waiting

                        Comment

                        • Eab
                          XSive
                          • Sep 2020
                          • 60
                          • Rhode Island

                          #117
                          Originally posted by 2WheelFun
                          Was it just cleaning up the grounds that fixed it?
                          Reversed the wires going into the turn signal, turns out the light goes on either way but only blinks going a certain way, who knew!

                          Just took the first (legal) ride, local side roads topping out at 40 (not due to malfunction mind you). Changes gears no trouble, got smoke off the engine a bit but I think thats just misc cleaning chemicals, spilled oil residue etc burning off. Tested the idle when I got back home to see what it'd do with zero enrichment, it idles at what looks like around 850 when it's relatively warmed up, which seems suboptimal. I believe the spec is around 1100... the revs go up very slightly (when its hot) when I hit one of the carb mounts with WD40 so it looks like there's a leak there, but its not dramatic so I'm thinking it's not a huge problem. Figure I'll rub in some hylomar blue into the cracks and see if that changes the game any. Might be that the vacuum leak is whats hurting my idle.

                          Click image for larger version  Name:	20201031_174625.jpg Views:	14 Size:	147.4 KB ID:	860294
                          Last edited by Eab; 11-01-2020, 11:04 AM. Reason: Typos!

                          Comment

                          • nezzer
                            Administrator
                            • Feb 2006
                            • 142
                            • Denver, CO

                            #118
                            Congrats on getting it out on the road! I always wished my bike had a fuel gauge like yours. Oh well, at least my XS1100 has a low fuel light, which is more than I can say for my XS650 or my Suzuki TS250.

                            I watch a lot of automotive TV shows. Roadkill host David Freiburger has a mantra, Don't get it perfect, get it running. I love that quote. I have a bunch of old vehicles that all need something. And yet, the only one I work on at night is the one I drove that day. I am terrible about working on winter bike projects because I am too distracted working on my car getting it ready for my commute the next day.

                            Now that your 1100 is on the road, I am sure you will be busy improving it, but at least you get to enjoy while you do so.
                            '80 XS Special
                            JonathanKnez@hotmail.com

                            Comment

                            • TopCatGr58
                              Administrator
                              • Jul 2002
                              • 12650
                              • Portsmouth, Va.

                              #119
                              Hey Eab,
                              Okay, spritzed carb mounts, got increased RPM's. Likely leak spots, the boots to engine head mating surface, the boots are covered in rubber, gets baked hard, and can crack, etc., they normally don't get mounted with gaskets, can remove, clean, remount using 3-Bond and gaskets to better seal. 2nd leak point are the vacuum ports- the caps also get hardened and even though they may be ON the metal nipple, can be LOOSE and leak around their mounting. The boots themselves rarely leak because they are DUAL LAYERED/Walled, so outside can be cracked, but inner layer is usually still fine/intact/sealed, they just don't look a nice as new smooth boots. Finally, carb butterfly shaft seals, so may want to retest spritzing being more precise on where, ie. the boots vs. the butterfly shafts, and proceed from there depending on results.
                              T. C. Gresham
                              81SH "Godzilla" . . .1179cc super-rat.
                              79SF "The Teacher" . . .basket case!
                              History shows again and again,
                              How nature points out the folly of men!

                              Comment

                              • Eab
                                XSive
                                • Sep 2020
                                • 60
                                • Rhode Island

                                #120
                                Originally posted by TopCatGr58
                                Hey Eab,
                                Okay, spritzed carb mounts, got increased RPM's. Likely leak spots, the boots to engine head mating surface, the boots are covered in rubber, gets baked hard, and can crack, etc., they normally don't get mounted with gaskets, can remove, clean, remount using 3-Bond and gaskets to better seal. 2nd leak point are the vacuum ports- the caps also get hardened and even though they may be ON the metal nipple, can be LOOSE and leak around their mounting. The boots themselves rarely leak because they are DUAL LAYERED/Walled, so outside can be cracked, but inner layer is usually still fine/intact/sealed, they just don't look a nice as new smooth boots. Finally, carb butterfly shaft seals, so may want to retest spritzing being more precise on where, ie. the boots vs. the butterfly shafts, and proceed from there depending on results.
                                There are like 9 helpful things I didn't know here, thanks TC!

                                Just got a decent hour run in, probably average speed around 45 so it warmed up plenty. Idle RPMs look like they are where they need to be (i put that hylomar on yesterday), bit of a learning curve on the takeoff with enrichment off, but thats a newbie/learning curve type deal, only got my MC permit last month! I notice at startup a little smoke coughs out somewhere near the carbs, unless I'm seeing things but it runs well enough where I feel I'm in the "if it ain't broke" zone. Hot damn these things are F U N.

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