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  • cams

    does anyone know for sure, positively, 100% if the cams from an 78xs1100 e are the same as the cams from the 79 special? interchangeable?

  • #2
    The '78-79 camshafts (both standard and special) are supposed to be identical, according to all available info (published specs, part numbers, etc). I'm not aware of anybody having an issue with interchanging these.

    The later cams are nearly identical, having less duration and overlap but slightly more lift on the exhaust valves. These will slightly reduce power if swapped for the early cams.
    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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    • #3
      ..................
      Last edited by petejw; 01-13-2011, 12:31 AM.
      pete


      new owner of
      08 gen2 hayabusa


      former owner
      1981 xs1100 RH (aus) (5N5)
      zrx carbs
      18mm float height
      145 main jets
      38 pilots
      slide needle shimmed .5mm washer
      fitted with v/stax and uni pod filters

      [url]http://www.youtube.com/watch?v=3pA8dwxmAVA&feature=mfu_in_order&list=UL[/url]

      Comment


      • #4
        yep the 78 and 79 cams are the same,

        was just comparing the early model cams to the later
        ones and noticed the holes for the oil gallery are slightly
        larger in the later cams.
        pete


        new owner of
        08 gen2 hayabusa


        former owner
        1981 xs1100 RH (aus) (5N5)
        zrx carbs
        18mm float height
        145 main jets
        38 pilots
        slide needle shimmed .5mm washer
        fitted with v/stax and uni pod filters

        [url]http://www.youtube.com/watch?v=3pA8dwxmAVA&feature=mfu_in_order&list=UL[/url]

        Comment

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