SOHC.co.uk Forums > CB350/400

New to CB400 four and new here! Front brake improvement?

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Mikep328:
Thank You!  With the caliper removed (or just loosened), the spring easily moves the arm/pad back on its own.  The piston/pad is not noticeably retracting back into the caliper when brake pressure is released.  I'm now wondering if a new seal is needed.  Sounds like caliper disassembly/inspection would be a good thing...

Oddjob:
The groove the seal is fitted into is notorious for getting hardened crud inside it, clean that really well and fit a new seal, inspect the piston for rust spots and chrome flaking as well, if any present replace that as well.

Stainless steel pistons are available to cure the rusting problem

Mikep328:
Will do, thanks!  Any preferred source for CB400 brake caliper seals and pistons?

Bryanj:
Classichonda spares do a stainless piston and seal kit, cheaper to buy direct than ebay

Oddjob:
Yeah, good shout Bryan, used them myself.

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