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89 YZ Rear Brake Caliper Seized

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My rear brake caliper sliders are seized up solid (the side to side floating mechanism not the piston).  Does anyone know what later model calipers will fit an 89 or how to unseize the floating pins?  I have tried penetrating oil and a vice with no success.

Edited by Corkster

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Time for new seals and pistons the pistons will wear out over time and cause drag from the debris build up. Unless the piston surfaces are smooth be worthless trying to fix the old ones.

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Time for new seals and pistons the pistons will wear out over time and cause drag from the debris build up. Unless the piston surfaces are smooth be worthless trying to fix the old ones.

See original post - there is nothing wrong with the pistons, they are working perfectly.  It is the floating mechanism that has seized.

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There is no floating mechanism you have your seals and the piston that pushes on the pad, the caliper it's self and the caliper carrier and your pads and your brake line.

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There is no floating mechanism you have your seals and the piston that pushes on the pad, the caliper it's self and the caliper carrier and your pads and your brake line.

Sorry but you are completely wrong - have a look at an early caliper.  It is two piece floating design - the single piston pushes from one side and the passive side moves to take up the free play.  They are connected by a sliding mechanism.

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