rear caliper refurb
- Thread starter Ish
- Start date
I used a tiny electricians flat bladed screwdriver,just gently scrape the corrosion out and flush it clean with some brake cleaner
EDIT: idk why they cant make a stainless steel insert that the seals sit in,they are always corroding like that being aluminium and they bind/push out the seals eventually
EDIT: idk why they cant make a stainless steel insert that the seals sit in,they are always corroding like that being aluminium and they bind/push out the seals eventually
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Stainless steel in contact with aluminum promotes galvanic corrosion. Hard anodising would be a better solution, but all comes down to cost I suspect.
its why replacing your engine bolts with stainless ones can be a problem.
Before you put the piston back in spray it with PTFE spray or teflon spray whichever you want to call it. Then every time it comes to cleaning your calipers re spray the pistons with ptfe spray, you will love the benefits, keeps dirt from sticking to the piston and keeps the piston sliding smoothly. Win! I used to use red grease on the pistons till i realized it acted like a magnet for attracting dirt to stick which ended up being pulled into the seals :/
This, dont use anything hard like a screwdriver, you are just creating channels in the already soft metal for more dirt to work their way past the seals.
For the best solution you should pop the piston and put new seals in, but for a quick go, just take the caliper off, pump the brake a bit to pop the pistons out further, give them a clean with a toothbrush and brake cleaner then push them back in with with some caliper grease around the base, not all over the piston.
If its that hard then the piston has already had it and its time to replace. you are just delaying the inevitable.
It will end up looking like this even after a clean with wire wool or sand paper. (on the left obviously...
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It will end up looking like this even after a clean with wire wool or sand paper. (on the left obviously...
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The seals only touching there is whats causing the problem lol, why do you think it pitted in the first place, if it did it before it will do it again even quicker, either you clean your calipers weekly or you are very lucky
Plus if you actually use your brakes then once the pads wear down that pitted area is going to be moving out.
Plus if you actually use your brakes then once the pads wear down that pitted area is going to be moving out.
No I don't mean the pistons,I didn't see the PIC till now,if those are pitted then yeah replace them,but for new seals you can clean,scrape the crud out of the groove that they sit in without marking the caliper if your carefull and take your time
None of my pistons were pitted like the above but the seal grooves were corroded,once I'd cleaned then up with a flat bladed screwdriver and fitted new seals they were fine,they hadn't been touched in at least 15 years so they were sticking on ect
Edit: the seals fit into the caliper on the zx6r,one fluid seal and above that a dust seal
None of my pistons were pitted like the above but the seal grooves were corroded,once I'd cleaned then up with a flat bladed screwdriver and fitted new seals they were fine,they hadn't been touched in at least 15 years so they were sticking on ect
Edit: the seals fit into the caliper on the zx6r,one fluid seal and above that a dust seal
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Yeah same on mine also, fluid seal then dust seal, I think it all depends on the caliper design also, most of the early suzuki ones are terrible, and the 6pot kawasaki ones I found awful also.
Currently running the R1/6 monoblocks and they are so much better, had them on my 750 also and never had a problem.
Currently running the R1/6 monoblocks and they are so much better, had them on my 750 also and never had a problem.
I cleaned up the caliper and changed the seals even though it was only the dust seal which was mangled.
As mentioned I used a small screwdriver to remove the crap out of the seal grooves. A toothrush wasn't shifting the harder bits.
It's all workin fine now.
As mentioned I used a small screwdriver to remove the crap out of the seal grooves. A toothrush wasn't shifting the harder bits.
It's all workin fine now.
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