The Industry Standard: Performance Machine Classic 4-Piston Caliper

Elevate your motorcycle’s safety and style with the Performance Machine (PM) Classic 4-Piston Caliper. While factory calipers are often cast and prone to “flexing” under heavy use, PM calipers are precision-engineered to provide a rock-solid lever feel and the aggressive deceleration required for modern traffic and heavy baggers.
Differential Bore Engineering

The “Classic” series utilizes PM’s patented Differential Bore technology, which is the secret to its legendary performance:

Staggered Piston Sizes: By using a smaller leading piston and a larger trailing piston, the caliper applies pressure more effectively as the rotor spins through the pads.

Eliminate Tapered Wear: This staggered pressure ensures that the brake pads wear flat and evenly, preventing the “tapering” common in standard 4-piston setups.

Linear Response: Experience a predictable, smooth, and powerful “bite” from the moment you touch the lever until you reach a full stop.

Premium Billet Construction

Machined Rigidity: Every Classic Caliper is CNC-machined from a solid block of high-strength billet aluminum. This creates a rigid housing that does not expand under heat, eliminating the “mushy” lever feel and ensuring 100% of your hydraulic pressure is converted into stopping power.

The Industry Standard: Performance Machine Classic 4-Piston Caliper

Elevate your motorcycle’s safety and style with the Performance Machine (PM) Classic 4-Piston Caliper. While factory calipers are often cast and prone to “flexing” under heavy use, PM calipers are precision-engineered to provide a rock-solid lever feel and the aggressive deceleration required for modern traffic and heavy baggers.
Differential Bore Engineering

The “Classic” series utilizes PM’s patented Differential Bore technology, which is the secret to its legendary performance:

Staggered Piston Sizes: By using a smaller leading piston and a larger trailing piston, the caliper applies pressure more effectively as the rotor spins through the pads.

Eliminate Tapered Wear: This staggered pressure ensures that the brake pads wear flat and evenly, preventing the “tapering” common in standard 4-piston setups.

Linear Response: Experience a predictable, smooth, and powerful “bite” from the moment you touch the lever until you reach a full stop.

Premium Billet Construction

Machined Rigidity: Every Classic Caliper is CNC-machined from a solid block of high-strength billet aluminum. This creates a rigid housing that does not expand under heat, eliminating the “mushy” lever feel and ensuring 100% of your hydraulic pressure is converted into stopping power.

Fitment Notes & Exceptions
This is a universal fit part; it may or may not fit without modification.