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  • #1

    Megacycle Cams

    I'm thinking about getting a spare motor and building it to swap into my XS, I saw all the posts about all the overbore kits and will probably go with the nicer Wiseco forged pistons as I may be putting a turbo/converting to fuel injection on the bike eventually.

    Only camshaft's I could find were for the ones made by Megacycle, does anyone have any experience with these? I have read they can add incredible midrange torque.

    Also, is there a legitimate safe limit to rev these motors out to? The build would most likely be stock crank and rods, big bore forged pistons, cams with springs/retainers/etc. Any guesses what a safe rev limit would be?

    Also, any other precautions you guys can think of? Obviously oil cooler, has anyone ever made a custom cylinder block with larger air fins/etc. like they do for the GS for the really big bore kits? Any info or suggestions would be much appreciated


    Thanks
    81 XS11 Special
    Tags: None
  • #2
    I highly recommend you search for post and info by Dan Hodges. He has over the years tries about every combination and methodology possible and dyno tested for results. Not sure he ever went turbo with it. But his info may give you a lot of insight into what is truly possible. And what results to expect.
    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

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    • #3
      Did a search, lots of great info attached to that name! Thanks!
      81 XS11 Special

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      • #4
        If you're thinking about a turbo down the road, keep in mind that too much cam duration/overlap is a bad thing as you'll blow your boost out the exhaust.

        Getting large power out of these normally aspirated is an expensive proposition.....
        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...

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        • #5
          Have a look here, http://www.xs11.com/forum
          I am the proud owner of BDF's XS "Hot Rod" build and it's an amazing ride. It will go faster than I want to go (well once or twice) . Excellent throttle response all the way to the top end. I can average around 32mpg if I go easy on the throttle, 30mpg most of the time. 165km/h is the fastest it's been pushed to which is a bit higher than what BDF had recorded on the Dyno .

          It's not too loud but after 5000rpm it sounds like a F1car and vehicles behind start to back off to 4 or 5 car lengths away. One of the things I really enjoy
          BDF Special
          80SG Vetter bagger 1196 Wiseco big bore kit, Mega Cycle Cams, slotted cam gears, ported and flowed head, bronze intake seats, Dyno Jet kit, Dyno coils and Mikes XS air pods, Venture cam chain adjuster,Geezer's regulator, Clutch mod, Mac 4 into 1 with custom built and tuned baffle, Oil cooler,MikesXS emulators mod.
          Dyno tuned to 98 hp at the rear wheel.

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          • #6
            The link just goes back to the Main forum page
            1980 XS1100G "Dolly G" Full Dresser (with a coat of many colors )
            1979 XS1100SF (stock-euro mods planned)
            1984 XV700L Virago (to be hot-modded)
            1983 XJ750MK Midnight Maxim (semi-restored DD)
            1977 XS650D ( patiently awaiting resto)

            Sometimes it takes a whole tank of gas before you can think straight.

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            • #7
              When riding with higher revs the weakest part will be your HyVo chain. A friend of mine is into classic endurance racing and spilled an engine because his chain broke and made a large hole in his engine destroying it beyond repair.
              Here a quote from the UK topic:

              author=baloo link=topic=9020.msg81747#msg81747 date=1297409533
              good project ! but it's a lot of work to make a race bike with a xs 11 , the "big" probleme is the weight !! for the engine try to have power at 6000 to 9000 not over 9500 because over 9500 the engine was "fragile" , i see it at Spa in 2008
              XS1100 3X0 '82 restomod, 2H9 '78 chain drive racer, 3H3 '79 customized.
              MV Agusta Brutale 910R '06.
              Triumph 1200 Speed Trophy '91, Triumph 1200 '93.
              Z1 '73 restomod, Z1A '74 yellow/green, KZ900 A4 '76 green.
              Yamaha MT-09 Tracer '15 grey.
              Kawasaki Z1300 DFI '84 modified, red.

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              • #8
                Originally posted by Schming View Post
                The link just goes back to the Main forum page
                Sorry about that hopefully this will work http://www.xs11.com/forum/showthread.php?t=25997
                BDF Special
                80SG Vetter bagger 1196 Wiseco big bore kit, Mega Cycle Cams, slotted cam gears, ported and flowed head, bronze intake seats, Dyno Jet kit, Dyno coils and Mikes XS air pods, Venture cam chain adjuster,Geezer's regulator, Clutch mod, Mac 4 into 1 with custom built and tuned baffle, Oil cooler,MikesXS emulators mod.
                Dyno tuned to 98 hp at the rear wheel.

                Comment

                • #9
                  Awesome guys, thanks for all the great info!
                  81 XS11 Special

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