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URGENT I have a USA spec Honda CB125S(XR200 engine)I NEED a hydraulic caliper.

Discussion in 'Tyres Wheels and Brakes' started by grcamna5, Jan 6, 2022.

  1. grcamna5

    grcamna5 Active Member

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    G'day fellow members,I have a USA spec Honda CB125S which has a cable actuated mechanical caliper disc front brake and needless to say,it feels like I have only half a front brake:( I have had a close-call or two on the road with my powerless front brakes.I plan to swap-in a hydraulic caliper and master cyl. onto the front end which will require me to custom make? a left side bracket where my present mechanical caliper mounts now.
    I don't have access to non-USA left side mount hydro calipers but would certainly make use of what I Do have available to me here.I believe this mounting point on my left side fork is very much the same with the optional mounting holes cast into the fork leg of a Honda CG125 which comes from the factory with a small front drum brake.
    I will try to upload a couple pics of the caliper and mounting points on the fork leg.
    Do any of you have some helpful ideas for me ? thanks,Bill
     
  2. grcamna5

    grcamna5 Active Member

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    This is a picture of the mounting points of my caliper

    20220104_133823.jpg

    This is another pic of the front wheel/brake.

    20220104_133623.jpg
     
  3. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    That swinging caliper mount is very similar to the early 1970's CB 350/400/500/750 fours. Maybe have a look at grafting a caliper from one of those to your 3 hole mounting.
     
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  4. grcamna5

    grcamna5 Active Member

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    Here's another one
    Hello Murdo and thanks for your response,I have been considering that(that one's a bit heavy & not as high performance)and it's still going to require me to do some modification to that mount with a bracket of some type.I wonder if there's any bucket racers on here,who had at one point started racing on a CG125 and were able to find a small,lightweight little OEM caliper with dual pistons and then custom make a special bracket to mount that behind the left fork leg?
    I'm also considering a 2000'+ newer generation dirtbike which has a left mount front hydraulic caliper:those little calipers are lightweight and powerful.The stock disc I have is stainless steel.. and measures 5mm thick by 240mm O.D.
    I want to continue to use my stock forks,triples and 18" spoke wheel as they will continue to give me good 'road feel' on this lightweight little machine.
     
  5. grcamna5

    grcamna5 Active Member

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    These 2 calipers are a CB350F hydraulic caliper on the left and a caliper body just like mine(CB125S)on the right.
    The CB350F caliper has the back portion near the spokes which is thicker and it will hit the spokes.
     

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