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Old 08-08-2014, 04:44 PM   #1
doublesnaggle OP
Joined: Aug 2014
Oddometer: 4
Aftermarket master cylinders? Is anyone doing this? Can I?

Ive been researching and I am not finding many people swapping out their oem brake master cylinders for aftermarket. There are some really nice options available, and I want to swap mine out. But I can't find any data on how, or which one to pick.

Some of these look great:


But how do I pick one if they don't list my bike?
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Old 08-08-2014, 05:04 PM   #2
jack of all trades...
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Joined: Dec 2007
Location: Delaware Ohio
Oddometer: 8,799
You need to know the master cylinder piston size to buy an appropriate replacement. Bigger piston reduces leverage making for weaker braking - you have to squeeze harder - and less lever travel since it pushes more fluid. Smaller piston will make for stronger braking, but if the fluid movement is too small the lever might pull back to the grip. Thus the best size is the OEM size. From there you can run any brand.

My Yamaha SR500 has a Honda VF500F caliper paired with the 83 GoldWing single caliper master cylinder - the Wings had one front caliper linked to the rear brake, the other was operated at the bars. Works great.
Ever get lost? You know, that good kind of lost - come to a dirt road intersection and you have no idea where you are or which way to turn? I like when that happens!

Mark - klx678
95 KLX650C w/Vulcan piston bigbore, Now an 09 KLX250S, selling my 90 Zephyr 550
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Old 08-11-2014, 03:29 PM   #3
Joined: May 2013
Location: Wichita Kansas-USA
Oddometer: 91
front master cylinder ratios

This helped me for swaps.Maybe it will help you:
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