need help with oem honda twin piston calipers
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need help with oem honda twin piston calipers

This is a discussion on need help with oem honda twin piston calipers within the Technical forums, part of the Caferacer.net Forums category; im planing on running OEM twin piston calipers on my 78 CB750F front end i have a set of 82 Gl1100 calipers and brakets. also ...

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  1. #1
    Senior Member jaguar's Avatar
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    need help with oem honda twin piston calipers

    im planing on running OEM twin piston calipers on my 78 CB750F front end
    i have a set of 82 Gl1100 calipers and brakets. also a set of other twin piston calipers off a cb900F. when i got more into them i see that one set has larger pistons then the other. i thought that they were all the same. when i cross refferance the parts online it looks like there are two sizes that came on the cb900f.
    anyone have more info?
    im looking to buy parts to rebuild them so thats why im asking
    on is 30mm the other is 32
    thanks
    I am Derby\'s Bitch


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  2. #2
    Senior Member robin1731's Avatar
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    Linked brakes on some Honda's had different size pistons.
    1976 Gold Wing Super Sport
    1976 KZ900 Dragbike
    1992 ZX7 Dragbike (KZ motor) w/nitrous
    1985 Honda Elite (pit bike)

  3. #3
    Senior Member Geeto67's Avatar
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    cb900fs do not have linked brakes and the piston sizes should be the same. The pistons and seals should be approx $15 per from honda. the 900f brakes are direct bolt on to 78 F only if you grabbed the mount from the 900f also.
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  5. #4
    Senior Member jaguar's Avatar
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    i have the brackets for the calipers
    bikebandit lists the pistins for 30! damit

    well the question was about the fact that one set of the calipers that i have has 32mm pistons.
    the cb900F has 30mm

    the other set up is off a V65.
    seems like the calipers are the same. ill mock them up to be sure

    bigger is better right?


    also the GL1100 has the same part numbers as the CB900F as best as i can tell

    thanks
    I am Derby\'s Bitch


    Some times things come around that are so singularly inept it gives you a whole new appreciation for the ept

  6. #5
    Senior Member Geeto67's Avatar
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    the thinking used to be bigger is better, now it is smaller but more of. The bigger the pistons got in brakes, the more force was required to move them the same distance, they still transferred the load over a greater surface area which was good. now if you look at top of the line brakes they are 6 piston, 5 piston, etc... because the little pistons do the same job but faster and with less effort.

    Ever tried. Ever failed. No matter. Try Again. Fail again. Fail better.
    - Samuel Beckett
    A tool is just an opportunity with a handle
    - Kevin Kelly

  7. #6
    Senior Member jaguar's Avatar
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    yeah i hear you about that.
    love the new R1 front brake set up.

    they both look like the same size pads.
    and this isnt a race bike and im no race rider so im sure eather caliper will be fine
    im going to price out parts and see what set makes more sence
    any good leads on pistons?
    all of them are nicked up or damaged in some way due to age rust or removale
    I am Derby\'s Bitch


    Some times things come around that are so singularly inept it gives you a whole new appreciation for the ept

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