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Fits 5/8" bore master cylinder on 1987-1993 FXR, FXRS and FXLR, 1987-1993 Softail, 1991 FXDB-S, 1993 FXDWG and all 1986-1995 Sportster, Rebuild kit, Daytona International (OEM 45072-87)
Complete repair kits for stock style brake master cylinders include all internal parts needed for a complete rebuild. Can be used with DOT 3, DOT 4 or DOT 5 brake fluid but you should always stay with the same brake fluid type as the three types are chemically incompatible. Bore size is usually indicated on the underside of the master cylinder.