1. Walter Tulin

    HZJ75 series RHS break caliper cups

    Hi, I am repairing my break caliper. The cups/pistons have ceased due to rust. I pulled the cups out. The sides of the cups look ok with minimal pitting. Someone advised me to sandpaper the internal bore of the caliper (where the cups/pistons sit) to remove any rust. Is this ok to do? and how...
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