SOHC.co.uk Forums > CB500/550
Front brake caliper piston
Yoshi823:
That's interesting...i'd like to see what the differance is between the two types of pistons then. I wonder if it's just something like the dust seal groove in the piston, or a part that isolates the piston from the heat of the pad under heavy braking.
Wemoto do a stainless piston kit though... http://www.wemoto.com/bikes/Honda/CB_750_F_F1/76-77/
From what I can see from the pictures the internal part of the 750F1 piston is hollow, as against the solid looking item for the 250/400/500/550 Honda piston.
I reckon I can make a 750F1 piston if I had an original, together with a 400/500/550 one. I have my big lathe working now so this manufacturing this wouldn't be difficult.
Seamus:
There was a similar thread on the US site
http://forums.sohc4.net/index.php?topic=66855.0
Probably worth a read
Cheers
Seamus
Spitfire:
Just looked through some of my old posts on this site and the US one and back then I also found a site that stocked brake pistons. You ordered by size rather than make and model, the one I got looked good but I went the stainless route instead.
There is a photo of the new piston alongside the original F1 piston in the thread as well.
http://forums.sohc4.net/index.php?topic=23037.msg244536#msg244536
Cheers
Den
captaindonutbikes:
i just got hold of one of the phoelic pistons from Kevin is the us. that coupled with a reconditioned caliper and a new brake seal should see me right.
florence:
Sounds good...
I put my caliper back together with a standard piston in the end. I then went to bleed the brakes and the bleed nipple snapped off which made me rather cross. However I have found someone who can remove them with acid which does not damage the aluminium. I don't know if others have heard of this and if it is useful? i expect you know about it already.
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