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bore size, master cylinder, piston

 
 
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Old 20th May 2019
Roane Roane is offline
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Join Date: Oct 2018
Posts: 131
Sportster/Buell Model: Sportster
Sportster/Buell Year: 1977
Reputation: 19759
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Default what brake master cylinder can I use?

I posted this question in another thread about an electrical problem I am having but thought I should probably separate it as it is related to me but unrelated to you.

Any idea the bore size of this master cylinder (is OEM for my bike I think... 1977 sporty) but it’s running to dual calipers (no idea the number of pistons and there are no markings anywhere I can find stating bore size anywhere).
The calipers look like they might be V-Twin.
https://www.jpcycles.com/product/241...left-and-right

This is the pricey master I want to use, which comes in 9/16" or 11/16"
https://www.rolandsands.com/product/...r-mount/chrome

Here are the links to the pics from my bike.
http://xlforum.net/forums/attachment...5&d=1558298552

http://xlforum.net/forums/showthread...2072109&page=3
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