SOHC.co.uk Forums > CB500/550

Front brake caliper piston

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Yoshi823:
I was surprised to not see a piston kit from these people... http://www.wemoto.com/bikes/Honda/CB_550_F_F1_F2/75-80/

But the OEM part shouldn't rust quickly...Dave Slivers do them http://www.davidsilverspares.co.uk/parts/part_62213/

florence:
Thanks for that.  I did order mine from Dave Silver and it's on the way.

I have found they rust all too easily.  It only needs to be a small spot of rust in the working area and then I don't trust it.  Maybe I'm being too careful?

Spitfire:
I replaced the piston in my CB750F1 with a stainless one from a guy on US eBay, the front brake piston for the CB750F1 are very difficult to source, I went the stainless route so I would not have to do it again. The back of the piston and caliper I lightly cover with silicon brake grease (from Brembo).
If there is rust on the contact area with the seal then it will not "heal up" so best to replace it

Cheers

Den

Yoshi823:
Is the piston dust seal damaged on the caliper?

I thought that the piston for the 750F1 would be the same for the similar calipers on the 750K7, 550F1 & F2, 500T etc etc?
http://www.davidsilverspares.co.uk/parts/part_52251/
http://www.davidsilverspares.co.uk/parts/part_62213/
http://www.davidsilverspares.co.uk/parts/part_61411/
http://www.davidsilverspares.co.uk/parts/part_13841/

Spitfire:
Unfortunately the F1 front brake piston is different, I checked out the brakes on late CB750's and came up with a chart showing interchangeabilty, the K7 and K8 are the same piston but no one had them at the time I was putting mine together. The caliper itself is also fairly elusive,so I have a spare refurbisheed one in the loft.
http://www.sohc.co.uk/index.php?topic=1562.0

Cheers

Den

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