Topic: Full precision overhaul of the rear brake caliper to completely eliminate brake drag. Details: Tonight’s mechanical log focuses on the iconic Suzuki GSX750S KATANA. Inspection revealed severe rear wheel rotational resistance—the wheel barely spun half a turn by hand due to frozen caliper pistons. Disassembly confirmed that oxidized aluminum corrosion inside the seal grooves had expanded, excessively squeezing the rubber piston seals against the caliper pistons and disabling proper roll-back action. We ultrasonically cleaned the caliper body, scraped all corrosion from the seal grooves, mirror-polished the pistons, and installed fresh OEM seals with silicone grease. Verdict: The rear wheel now spins effortlessly with zero friction drag, and pedal feel returns to a razor-sharp, knife-edge responsiveness. Precision prep work restores the true cutting edge to the Katana!