01-05-15, 08:43 PM
Yes they should be able to turn as the are just cylinders in a tube but some rust may be on the actual calipers as there's some on the pistons in your pic.
What I'd do?
Clamp the brake pipe to stop fluid getting through, someone once told me a wee trick is to open the reservoir at the handlebars so it reduces pressure to, then I'd strip the whole caliper down completely, and using wet and dry, but really wet, sandpaper lightly go over all the pistons and the internal chambers, reassemble and that should give you the result you want.
I know you'll just love doing it now your not scared of your bike anymore, plus you'll also do the front ones after you do the rear lol
Oh meant to say, remember and dry them off before reassembly, some will say smear something on them to help slide, but personally I've only put very fine oil on a wee bit to help them slide in, nothing too heavy.
What I'd do?
Clamp the brake pipe to stop fluid getting through, someone once told me a wee trick is to open the reservoir at the handlebars so it reduces pressure to, then I'd strip the whole caliper down completely, and using wet and dry, but really wet, sandpaper lightly go over all the pistons and the internal chambers, reassemble and that should give you the result you want.
I know you'll just love doing it now your not scared of your bike anymore, plus you'll also do the front ones after you do the rear lol
Oh meant to say, remember and dry them off before reassembly, some will say smear something on them to help slide, but personally I've only put very fine oil on a wee bit to help them slide in, nothing too heavy.
Colin
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Ride fast, ride a red bike :-)
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Ride fast, ride a red bike :-)