REAR BRAKE MASTER CYLINDERS FOR BIG TWIN & SPORTSTER

Weight: 0.06
CNC machined from aircraft quality aluminum alloy. The bore is ⁵/₈" diameter. The smaller piston diameter produces more pressure and increases stopping power. This master cylinder is designed to work in conjunction with the dual piston GMA brake calipers. Will also work with Grimeca and other aftermarket dual piston calipers.

Note: Early master cylinders were used in conjunction with the OEM rebuild kit 42374-82A and required shortening the plunger rod. Late master cylinders use a redesigned rebuild kit and do not require shortening the plunger rod. Verify the correct kit needed before ordering.
V-FACTOR
5/8" Bore Rebuild Kits for master cylinders manufactured prior to February 1998
Fits FXSB 1983/1986, FXWG 1983/1986, FXE 1984/1986, Softail 1984/Early 1987, Sportster 1982/Early 1987
Replaces HD# 42374-82B