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  • Question about brake piston

    Does anybody know of a supplier for a rear brake piston on a '79 SF? They seem to be hard to find. I'll make one if I have to, but would rather find one.

  • #2
    The Special's (79-80) rear brake caliper is the same as the Standard's front caliper (all years). These pistons are easy to find. Should be this one, double check the size first though...

    http://cgi.ebay.com/ebaymotors/Yamah...Q5fAccessories
    2H7 (79) owned since '89
    3H3 owned since '06

    "If it ain't broke, modify it"

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    • #3
      Somebody should bookmark this one Phil, as these guys also list pistons for the Specials' front calipers, as well as front and rear for the Midnights and XJ...
      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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      • #4
        thanks, guys

        I appreciate the information.

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        • #5
          I am looking for a piston for my 78E. It looks like the caliper is different for this year - and also for the S in 79. Any idea of these really are different?
          _____________________
          78 XS1100 - mainly stock

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          • #6
            I know the caliper are different from specials to standards, don't know if the pistons are different though.
            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

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            • #7
              Originally posted by tri650 View Post
              I am looking for a piston for my 78E. It looks like the caliper is different for this year - and also for the S in 79. Any idea of these really are different?
              The overhaul parts for the 'standard' calipers (piston, seals, pads) are all the same '78 though '81, both front and rear. The rear calipers on the 'specials' use the same parts. The 'special' front calipers are different and use completely different parts; the parts fiche show one number for the '79s, a different one for the '80-81s, although I believe the repair parts are the same.

              The link in post two shows what is supposed to be a 'standard' piston. If you go to their 'store' link and click on 'other' yamaha parts, they list pistons for all the various models of XSs...
              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

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