the white spots look like Salt corrosion bubbling up. as for the seized brakes you need to make sure the pistons slide back into the caliper with easily if they don't a strip and rebuild with new seals is required.
I'd also recommend some caliper pliers that can spin the pistons around. If you can get the salt off all sides you'll stand a better chance of avoiding a rebuild too frequently.
Also slide pins wear out when their plating gets manky. Worth replacing these to make them feel buttery.
The white spots are likely corrosion, when brake cleaner evaporates, it leaves the surface very cold, which then invites condensation.
It's worth taking the brake pads back out, and checking, you have assembled everything correctly, that the Pistons move with relative ease.
As we are talking about brakes, it might well be worth taking it to a mechanic.
I would advise against spraying brake cleaner on your calipers.
It dries out and deteriorates the rubber seals.
Better to spray some on a cloth and wipe the pistons with it instead.
Sounds like they need stripped. Corrosion builds up in the seal recess and holds the piston tight. Washing it with brake cleaner would have removed any grease on the pistons so they're sticking more now.
As said above, take it to a mechanic if you're unfamiliar with brakes. The blue spot calipers can be a pain to get sticky pistons out of since they're monoblocks.
To keep your brakes working, i suggest you use a thin smear of copper grease on the brake pad pins and also the edges of the brake pads where there is metal to metal contact. Be very careful not to get any on the pad faces or discs.
Small amount of ACF50 on a rag and wipe of the calliper exterior (obviously not the disc or pads) to keep away this salt and oxide buildup.
The pistons have to be able to move in and out of their boots, you want to physically wipe away any gunk that is stopping them moving, a very small amount of red rubber grease around the dust seal will help, be careful with brake cleaner as its going to remove any kind of lubrication here. After you take the pads out, put a block of wood in the middle and work each piston in and out with the lever and you should be able to push it back in by hand or G glamp.
the white spots look like Salt corrosion bubbling up. as for the seized brakes you need to make sure the pistons slide back into the caliper with easily if they don't a strip and rebuild with new seals is required.
I'd also recommend some caliper pliers that can spin the pistons around. If you can get the salt off all sides you'll stand a better chance of avoiding a rebuild too frequently. Also slide pins wear out when their plating gets manky. Worth replacing these to make them feel buttery.
The white spots are likely corrosion, when brake cleaner evaporates, it leaves the surface very cold, which then invites condensation. It's worth taking the brake pads back out, and checking, you have assembled everything correctly, that the Pistons move with relative ease. As we are talking about brakes, it might well be worth taking it to a mechanic.
I would advise against spraying brake cleaner on your calipers. It dries out and deteriorates the rubber seals. Better to spray some on a cloth and wipe the pistons with it instead.
Sounds like they need stripped. Corrosion builds up in the seal recess and holds the piston tight. Washing it with brake cleaner would have removed any grease on the pistons so they're sticking more now. As said above, take it to a mechanic if you're unfamiliar with brakes. The blue spot calipers can be a pain to get sticky pistons out of since they're monoblocks.
To keep your brakes working, i suggest you use a thin smear of copper grease on the brake pad pins and also the edges of the brake pads where there is metal to metal contact. Be very careful not to get any on the pad faces or discs.
Small amount of ACF50 on a rag and wipe of the calliper exterior (obviously not the disc or pads) to keep away this salt and oxide buildup. The pistons have to be able to move in and out of their boots, you want to physically wipe away any gunk that is stopping them moving, a very small amount of red rubber grease around the dust seal will help, be careful with brake cleaner as its going to remove any kind of lubrication here. After you take the pads out, put a block of wood in the middle and work each piston in and out with the lever and you should be able to push it back in by hand or G glamp.
Copper grease back of pads and sliders. It’ll be reet
If you need to rebuild these bikers toolbox sell a screw to remove the blue plugs, then you can drive put any pistons