Performance Machine 4-Piston Front Caliper Fits Harley-Davidson 1984-1999
Bolt on the stopping power your older Big Twin or Sportster never came with. Performance Machine’s differential-bore design squeezes the pad evenly from leading edge to trailing edge, so the lever feels firm and progressive instead of grabby, the pads wear flat, and the caliper stays quiet mile after mile. Machined from billet with the PM icon cut into the body, it looks as serious as it stops.
Key Features
- Differential-bore pistons apply less force at the leading edge of the pad and more at the trailing edge, so the pad wears evenly and the lever feel stays consistent as the pads age
- Direct bolt-on to the factory fork leg and the stock 11-1/2 inch rotor, so a brake upgrade does not turn into a rotor, bracket or brake-line project
- Machined from billet aluminum with the PM icon cut into the body, so the caliper carries the look of a finished custom part instead of a painted factory casting
- Supplied with brake pads, a bleeder screw and a 3/8-24 banjo bolt, so it goes on without a second parts order
- Sold as a single left-side or right-side caliper, so a single-disc bike buys one and a dual-disc bike matches a pair without paying for an unused side
Technical Specifications
- Brand: Performance Machine
- Model: 137×4 four-piston differential-bore caliper
- Pistons: 4
- Material: Billet aluminum
- Finish options: Chrome, Polished, Black Contrast Cut, Black Ops
- Rotor size: 11-1/2 inch (also 11.8 inch / 300mm rotors)
- Mounting: Direct bolt-on to the factory front fork leg
- Position: Front, left side or right side (sold individually)
- Included: Caliper, brake pads, bleeder screw, 3/8-24 banjo bolt
- Sold as: Each
- Country of origin: United States
Fitment Notes
| Years | Model family |
|---|---|
| 1984-1999 | Touring FLH / FLT |
| 1986-1999 | Softail FL (FLST) |
| 1984-1999 | Softail FX (FXST) |
| 1991-1999 | Dyna FXD |
| 1984-1994, 1999-2000 | FXR |
| 1984-1999 | Sportster XL |
- The left-side caliper is the single-disc caliper and the left half of a dual-disc pair; it fits every model in the family. The right-side caliper is for dual-disc front ends only: FLH and FLT Touring 1984-1999, FXR 1984-1993, FXDL and FXDS-CONV Dyna 1993-1999 and XL1200S Sportster 1996-1999.
- Dual-disc front ends require one left and one right caliper, purchased separately.
- Designed for the factory 11-1/2 inch front rotor; also suits 11.8 inch (300mm) rotors.
- Will not fit FXD, FXR or XL models with spoke wheels. Does not fit FXSTS or FLSTS Springer Softail models.
- The left-side caliper also covers the 2000 FXR4, listed in the Fitment tab.
- The table above is the broad coverage; review the Fitment tab for the specific model-by-model breakdown.
- Not affiliated with or endorsed by Harley-Davidson.
