Performance Machine 4 Piston Brake Caliper 125x4S
The Performance Machine 125x4S delivers the stopping authority of a four-piston caliper in a form engineered for the exacting geometry of Harley-Davidson Springer Softails and early Sportsters. Riders upgrading from stock brakes will notice an immediate improvement in feel, modulation, and overall braking confidence on the road or at a show.
Key Features
- Four-piston dual-action design for superior stopping power over single- and two-piston alternatives
- Precision-machined from billet aluminum for strength and corrosion resistance
- Available in Polished, Chrome, and Black Contrast Cut finishes
- Black Contrast Cut finish: polished base, black anodized, then machine-recut for a two-tone effect
- Fits 1988-2006 Softail Springer (FXSTS), 1995-1997 Bad Boy (FXSTSB), and 1984-1985 Sportster 1000 variants
- Includes brake pads, bleeder screw, and 3/8-24 banjo bolt
- Made in the USA
Technical Specifications
- Piston Configuration: 4-piston dual-action
- Disc Size: 11.5 inch
- Finish Options: Polished, Chrome, Black Contrast Cut
- Includes: Brake pads, bleeder screw, 3/8-24 banjo bolt
- Origin: Made in the USA
Fitment Notes
- Some installations may require an additional mounting bracket – verify before ordering
- Fits 1988-2006 Harley-Davidson Softail Springer FXSTS and 1995-1997 Bad Boy FXSTSB
- Also fits 1984-1985 Sportster 1000 XLH, Roadster XLS, and XLX variants
- Review the Fitment tab for the complete year and model breakdown












