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  • #1

    Electrical system requirements

    Hey everyone- happy tryptophan day tomorrow!

    Im going cafe with my 79 xs11f, and am wondering about the electrical system.
    the basic question i have is, how much can i afford to get rid of? If i don't need it, I don't want it. I don't know how the 79's electrical schematic ranks among the rest of the bike world, but I'm not the best electrician anyways. and obviously, Im going for as sleek and clean a look as possible.

    Also, any recs on 4-1 pipes?
    Or has anyone else out there run into anything else noteworthy while heading down the same road I'm starting on?

    much thanks!
    79xs11f - ugly as sin after sitting in a garage for 12 years, but rumbles like the beast that it is.
    Tags: None
  • #2
    Originally posted by theduke View Post
    I'm going cafe with my 79 xs11f, and am wondering about the electrical system.
    the basic question i have is, how much can i afford to get rid of? - - -
    Also, any recs on 4-1 pipes? - - -
    Hi duke,
    yeah, I've often thought that if my BSA 250 can be street legal with only eleven wires why is my XS11 harness as thick as my wang?
    Looking at the wiring diagram, alas, apart from the reserve lighting and flasher canceling units, your bike needs all that stuff.
    Pull the unwanted modules but if the harness is still in good shape and you intend to keep it I'd doubt the wisdom of splitting it open, removing 11 wires then taping it up again.
    I've no experience fitting a 4 into 1 pipes but whichever system you get, make sure you can change the oil filter with them installed and that the muffler has enough back pressure to retain the engine's mid-range power.
    Fred Hill, S'toon
    XS11SG with Spirit of America sidecar
    "The Flying Pumpkin"

    Comment

    • #3
      Up, fred pretty much hit it right, other than the wang thing...

      There really is not much electrically that can be removed, and it is especially not worth opening up that mess just to removed 5 or 6 wires ESPECIALLY if your not really much of an electrical person.
      Nathan
      KD9ARL

      μολὼν λαβέ

      1978 XS1100E
      K&N Filter
      #45 pilot Jet, #137.5 Main Jet
      OEM Exhaust
      ATK Fork Brace
      LED Dash lights
      Ammeter, Oil Pressure, Oil Temp, and Volt Meters
      Green Monster Coils
      SS Brake Lines
      Vision 550 Auto Tensioner

      In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

      Theodore Roosevelt

      Comment

      • #4
        Hey Duke,

        As for the pipes, aside from a set you find on ebay or such, MAC is the only reasonably priced game in town as well as the only manufacturer still making them for our bikes....on this side of the pond. There is something called the X-pipe, but $$ in price and shipping. The MAC's do provide clearance for both use of centerstand and oil/filter changes without dropping the pipes!

        T.C.
        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

        • #5
          Originally posted by natemoen View Post
          Up, fred pretty much hit it right, other than the wang thing...
          There really is not much electrically that can be removed, and it is especially not worth opening up that mess just to removed 5 or 6 wires ESPECIALLY if your not really much of an electrical person.
          Hi Nate,
          perhaps I exaggerated the size of my wang; as thick as yer thumb, OK?
          BTW, the wiring diagram shows 6 wires to the RLU plus 5 wires to the canceller, so it's not 5 or 6, it's 11.
          Still not worth splitting an existing good harness to remove them but if one was scratch-building a minimal harness, 11 fewer wires would thin it by perhaps a pinkie's worth?
          Fred Hill, S'toon
          XS11SG with Spirit of America sidecar
          "The Flying Pumpkin"

          Comment

          • #6
            I was just messing with you Fred!
            Nathan
            KD9ARL

            μολὼν λαβέ

            1978 XS1100E
            K&N Filter
            #45 pilot Jet, #137.5 Main Jet
            OEM Exhaust
            ATK Fork Brace
            LED Dash lights
            Ammeter, Oil Pressure, Oil Temp, and Volt Meters
            Green Monster Coils
            SS Brake Lines
            Vision 550 Auto Tensioner

            In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

            Theodore Roosevelt

            Comment

            • #7
              It's worthwhile checking out the basic wiring diagram discussion here
              Brian
              XS1100 LG "Mr T", SG "ICBM" & FJ1200
              Check out the XS Part Number Finder

              Be not stingy in what costs nothing as courtesy, counsel and countenance.

              Comment

              • #8
                Originally posted by fredintoon View Post
                ...BTW, the wiring diagram shows 6 wires to the RLU plus 5 wires to the canceller, so it's not 5 or 6, it's 11....
                In reality, you can't remove even that many; about 1/3 of these wires also go other places and can't be deleted (or only a short section of it can be), some of the remaining are short wires that don't go that far in the harness. If you remove complete circuits/systems such as the turn signals, you could get a few more but that will require splitting the entire harness. Any weight savings from the harness will be measured in ounces, so is it worth it?

                If you are willing to build a complete new custom harness, relocate the key switch and start button to near the seat, and replace the somewhat-complicated Yamaha hand controls with something more basic, you could shrink the main harness quite a bit. But this wouldn't be a project for the 'electrically challenged'.....
                Fast, Cheap, Reliable... Pick any two

                '78E original owner - resto project
                '78E ???? owner - Modder project FJ forks, 4-piston calipers F/R, 160/80-16 rear tire
                '82 XJ rebuild project
                '80SG restified, red SOLD
                '79F parts...
                '81H more parts...

                Other current bikes:
                '93 XL1200 Anniversary Sportster 85RWHP
                '86 XL883/1200 Chopper
                '82 XL1000 w/1450cc Buell, Baker 6-speed, in-progress project
                Cage: '13 Mustang GT/CS with a few 'custom' touches
                Yep, can't leave nuthin' alone...

                Comment

                • #9
                  4 into 1 exhaust

                  On the 78 that I just sold, I had 4/1 mac & pod filters. Had to rejet carbs to compensate. Ran great!

                  ( I'd like to know how Nate Knew the diameter of Freds wang)
                  Tom Clisham

                  Age is relative YOU WON"T GET OLD TIL YOU SELL THE BIKE
                  _____________________________________________

                  '78xs1100E ,all stock & original GONE TO WISCONSIN

                  '80 SG Vetter fairing,hard bags,trunk,fork brace,
                  stock headers with fishtail mufflers,black & beautiful GONE TO ARIZONA

                  79SF lowered,jardine 4/2 exhaust,pod filters,drilled rotors,fork brace, bar hopper

                  79SF 1 owner,8000 miles, restoring to completely original ( I hope) GONE TO FRANCE

                  Comment

                  • #10
                    Originally posted by tom clisham View Post
                    ( I'd like to know how Nate Knew the diameter of Fred's wang)
                    Hi Tom,
                    Nate doesn't. He only knows the diameter I claimed it to be.
                    The same diameter as an XS11SG's main wiring harness.
                    Fred Hill, S'toon
                    XS11SG with Spirit of America sidecar
                    "The Flying Pumpkin"

                    Comment

                    • #11
                      Wang

                      Got mine stuck in the driveshaft houseing once, don't ask me how, forgot about that dent to clear the tire Only had a half a foot more to go before I would have cleaned her out all the way

                      Originally posted by fredintoon View Post
                      Hi Tom,
                      Nate doesn't. He only knows the diameter I claimed it to be.
                      The same diameter as an XS11SG's main wiring harness.
                      1979 XS1100 Special (Mad Max, OEM) Current
                      1980 XS1100 Special
                      1990 V Max
                      1982 KZ750 LTD Twin
                      1986 700 FZR Yamaha Fazer (faster then expected)
                      1979 XS750 Special (my 1st Special)
                      1974 CB750-Four



                      Past/pres Car's
                      1961 Catalina 389/1970 Torino GT 351/1967GTO 12to1 comp./ Roller cam/ T-10/ 456 gear/Tri-power/1967 GTO 400, 1969 Camaro, 1968 Z28, 2001 BMW M Roadster 0 to 60 in 4.5 sec. Jaguar XK8

                      Comment

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