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78 Lift and Duration Specs From Down Under

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  • #1

    78 Lift and Duration Specs From Down Under

    Found this handy bit of info from our brother org down under:

    [Camshaft Timing 78 and 80]http://xs1100.com.au/forum/index.php?topic=2005.0[/URL]

    I think the thread is by owner of this 1980 bike putting out 107 hp at the wheels:

    http://youtu.be/B6wr-VJZZHY
    Last edited by Orange4; 01-16-2014, 11:18 PM.
    Living to EXcess.
    1978 XS1100E Canadian, Cartridge emulators, NOS heavy duty fork springs,
    Showa rear shocks, ACCT, Jardine 4-2 spaghetti pipes.
    1979 XS1100F Canadian, stock exhaust. Top end rebuild in progress.
    Tags: None
  • #2
    He is also a member here. For some reason I can't right now recall his handle though.
    Life is what happens while your planning everything else!

    When your work speaks for itself, don't interrupt.

    81 XS1100 Special - Humpty Dumpty
    80 XS1100 Special - Project Resurrection


    Previously owned
    93 GSX600F
    80 XS1100 Special - Ruby
    81 XS1100 Special
    81 CB750 C
    80 CB750 C
    78 XS750

    Comment

    • #3
      Originally posted by DGXSER View Post
      He is also a member here. For some reason I can't right now recall his handle though.
      Dan Hodges
      '79 XS11 F
      Stock except K&N

      '79 XS11 SF
      Stock, no title.

      '84 Chevy K-10 "Big Blue"
      GM 350, Muncie SM465, NP208, GM 10 Bolt with 3.42gears turnin 31x10.5 Baja Claws

      "What they do have is an implacable, unrelenting presence and movement that bespeaks massive power lurking behind paint and chrome. They don't wail like a screeching ninja, the don't rumble like a harley. They just growl like a spactic, stressed out badger waiting to rip your face off and eat your soul." Trainzz~RIP~

      Comment

      • #4
        Originally posted by WMarshy View Post
        Dan Hodges
        He was referring to the one 'down under".........was the one a couple yrs. back that was shown on the dyno, and he is a member here. Can't remember his forums handle tho.
        81H Venturer1100 "The Bentley" (on steroids) 97 Yamaha YZ250(age reducer) 92 Honda ST1100 "Twisty"(touring rocket) Age is relative to the number of seconds counted 'airing' out an 85ft. table-top.

        Comment

        • #5
          Somehow messed up the link but a kindly mod could fix that for me. Or just cut and paste like they did back in the olden days.
          Living to EXcess.
          1978 XS1100E Canadian, Cartridge emulators, NOS heavy duty fork springs,
          Showa rear shocks, ACCT, Jardine 4-2 spaghetti pipes.
          1979 XS1100F Canadian, stock exhaust. Top end rebuild in progress.

          Comment

          • #6
            That'd be Aussixs11G's bike you're talking about.
            Ironically, that thread was discussing his totally stuffed Ivan Tighe cams, so he replaced them with stock 78E cams with slotted sprockets to manipulate the timing. He reckons it was fast before, but now it's an absolute rocket! Can't wait for the next time it gets on the dyno.
            79 SF Special W/ Stock all original motor @ 384,000klms
            Stock exhaust, stock airbox, XJ sump, 78E carbs, Xs1100RH seat, Bosch superhorns, 5/8ths front M/c, braided lines, sintered SBS pads, drilled discs, progressive springs, 8" 50w HID headlight 4300K, 2 x 50w HID spiral driving lights, KONI shocks, Spade fuse box
            *Touring mode - Plexistar 2 screen, Gearsack rack & bag & saddlebags, homebuilt towbar
            *"The Keg"- UC torana hubs, XS11 discs, Tokico 4 spot calipers

            Comment

            • #7
              Trying to register for that site is a PITA. They ask you what your favourite motorcycle is as a verification but no combination of Yamaha or xs1100 works. What is the trick question there?
              Living to EXcess.
              1978 XS1100E Canadian, Cartridge emulators, NOS heavy duty fork springs,
              Showa rear shocks, ACCT, Jardine 4-2 spaghetti pipes.
              1979 XS1100F Canadian, stock exhaust. Top end rebuild in progress.

              Comment

              • #8
                Cam Timing

                Originally posted by Orange4 View Post
                Trying to register for that site is a PITA. They ask you what your favourite motorcycle is as a verification but no combination of Yamaha or xs1100 works. What is the trick question there?
                The cam timing (duration) for these motorcycles are as follows.

                78-79 models
                Intake duration- 247 degrees @ .040 lift & .345 valve lift (event angle 102 degrees)
                Exhaust duration- 247 degrees @ .040 lift & .327 valve lift

                80-82 models

                Intake duration- 235 degrees @ .040 lift & .345 valve lift (event angle 105 degrees)
                Exhaust duration- 235 degrees @ .040 lift & .0345 valve lift

                The early cams are worth 3-4 horsepower more than the late cams.
                81 Black "1179" Xcessively trick Super Special. One owner (me).

                Comment

                • #9
                  Interesting Dan. So, the cams were the same for 78/79? I hear a lot of people say that the cams were "hotter" on the '78 over the '79, where-as my dad said the only performance difference was timing and carb tuning.
                  1979 XS1100F
                  2H9 Mod, Truck-Lite LED Headlight, TECHNA-FIT S/S Brake Lines, Rear Air Shocks, TKAT Fork Brace, Dyna DC-I Coils, TC Fuse Block, Barnett HD Clutch Springs, Superbike Handlebars, V-Star 650 ACCT, NGK Irridium Plugs, OEM Exhaust. CNC-Cut 2nd Gear Dogs; Ported/Milled Head; Modded Airbox: 8x8 Wix Panel Filter; #137.5 Main Jet, Viper Yellow Paint, Michelin Pilot Activ F/R, Interstate AGM Battery, 14MM MC, Maier Fairing, Cree LED Fog Lights.

                  Comment

                  • #10
                    Thanks.

                    I noticed that if I set up the bike at TDC with a dial indicator, my cams are at least couple of degrees retarded from looking at the alignment arrows. I'm guessing this comes from chain stretch and losing the base gasket. Also, the exhaust is further retarded from the intake is overlap is reduced. Is it worth machining out the sprocket holes to get it back to stock or is that a waste of time for a few degrees?

                    Exhaust



                    Intake


                    Also, what is the ID of the stock exhaust. The Jardines I have are 1.280 and seem to have a reducing sleeve.

                    I can't help wondering how it would run with the early intake but late exhaust cams. Just curious.
                    Last edited by Orange4; 01-22-2014, 12:45 AM.
                    Living to EXcess.
                    1978 XS1100E Canadian, Cartridge emulators, NOS heavy duty fork springs,
                    Showa rear shocks, ACCT, Jardine 4-2 spaghetti pipes.
                    1979 XS1100F Canadian, stock exhaust. Top end rebuild in progress.

                    Comment

                    • #11
                      Wait a minute. I think those cam dots may be able to be re-aligned as part of the cam install. I believe all you have to do is remove your CCT, and put a wrench on your cam one at a time while at TDC to adjust. I think the manual says to only move those cam a hair to re-align, otherwise you may bend a valve. Or worse, wrench slips and u crack the head.
                      1979 XS1100F
                      2H9 Mod, Truck-Lite LED Headlight, TECHNA-FIT S/S Brake Lines, Rear Air Shocks, TKAT Fork Brace, Dyna DC-I Coils, TC Fuse Block, Barnett HD Clutch Springs, Superbike Handlebars, V-Star 650 ACCT, NGK Irridium Plugs, OEM Exhaust. CNC-Cut 2nd Gear Dogs; Ported/Milled Head; Modded Airbox: 8x8 Wix Panel Filter; #137.5 Main Jet, Viper Yellow Paint, Michelin Pilot Activ F/R, Interstate AGM Battery, 14MM MC, Maier Fairing, Cree LED Fog Lights.

                      Comment

                      • #12
                        And, not sure on ID of header. I do know they are double-walled.
                        1979 XS1100F
                        2H9 Mod, Truck-Lite LED Headlight, TECHNA-FIT S/S Brake Lines, Rear Air Shocks, TKAT Fork Brace, Dyna DC-I Coils, TC Fuse Block, Barnett HD Clutch Springs, Superbike Handlebars, V-Star 650 ACCT, NGK Irridium Plugs, OEM Exhaust. CNC-Cut 2nd Gear Dogs; Ported/Milled Head; Modded Airbox: 8x8 Wix Panel Filter; #137.5 Main Jet, Viper Yellow Paint, Michelin Pilot Activ F/R, Interstate AGM Battery, 14MM MC, Maier Fairing, Cree LED Fog Lights.

                        Comment

                        • #13
                          And thinking about something, you may very well be off a tooth on the sprocket. If I was you, I'd follow the manual yo the T, regarding cam install.
                          1979 XS1100F
                          2H9 Mod, Truck-Lite LED Headlight, TECHNA-FIT S/S Brake Lines, Rear Air Shocks, TKAT Fork Brace, Dyna DC-I Coils, TC Fuse Block, Barnett HD Clutch Springs, Superbike Handlebars, V-Star 650 ACCT, NGK Irridium Plugs, OEM Exhaust. CNC-Cut 2nd Gear Dogs; Ported/Milled Head; Modded Airbox: 8x8 Wix Panel Filter; #137.5 Main Jet, Viper Yellow Paint, Michelin Pilot Activ F/R, Interstate AGM Battery, 14MM MC, Maier Fairing, Cree LED Fog Lights.

                          Comment

                          • #14
                            Originally posted by IanDMacDonald View Post
                            Wait a minute. I think those cam dots may be able to be re-aligned as part of the cam install. I believe all you have to do is remove your CCT, and put a wrench on your cam one at a time while at TDC to adjust. I think the manual says to only move those cam a hair to re-align, otherwise you may bend a valve. Or worse, wrench slips and u crack the head.
                            Right now, I'm just set up to measure valve clearance on #1 so only intake and exhaust are in. The chain sets the timing between the cams. No wrenching is going to help that. The only way to change that is to elongate the sprocket holes. Not a big deal to do but worth it? That's out of my pay grade. I'm interested to see how far out Dan thinks those cams are.
                            Living to EXcess.
                            1978 XS1100E Canadian, Cartridge emulators, NOS heavy duty fork springs,
                            Showa rear shocks, ACCT, Jardine 4-2 spaghetti pipes.
                            1979 XS1100F Canadian, stock exhaust. Top end rebuild in progress.

                            Comment

                            • #15
                              Originally posted by IanDMacDonald View Post
                              And thinking about something, you may very well be off a tooth on the sprocket. If I was you, I'd follow the manual yo the T, regarding cam install.
                              Followed procedure to the T. They are not out. I put them out accidentally while I was monkeying with it before the cam was bolted down so I know how far they look when out by a tooth. ACCT is installed too.
                              Living to EXcess.
                              1978 XS1100E Canadian, Cartridge emulators, NOS heavy duty fork springs,
                              Showa rear shocks, ACCT, Jardine 4-2 spaghetti pipes.
                              1979 XS1100F Canadian, stock exhaust. Top end rebuild in progress.

                              Comment

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