See also Bleeding the Brake Lines In the REF section of the Sportsterpedia.

* . . . Rear Drum Fitting Issues with a Rigid Frame

Brake Fluid - recommendations, change intervals and bleeding advice.

• For use with DOT 5 brake fluid: Always clean brake system rubber parts by washing in denatured alcohol or DOT 5 brake fluid. Do not use mineral base cleaning solvents such as gasoline or paint thinner. These cause deterioration of non-metallic parts which would continue to deteriorate after assembly, possibly resulting in component failure. ¹⁾

1980 and up:

• If the motorcycle should fall on it's right side or the muffler and bracket should hit the curb, the brake stop bracket could be inadvertently bent. This could then allow the brake pedal to travel past it's stop and could result in the distort­ing or bending of the clevis rod end (42445-80). Although the bend in the clevis rod end will not adversely affect the brake function, it could allow increased brake pedal free play. This condition would cause the brake pedal to travel further when applying the brake. ²⁾
  • Inspection:
    • Inspect brake stop bracket (welded to muffler) for the correct bend periodically.
    • The bracket should form a 90° angle out from the muffler. If it is bent in either direction, tap it with a ball peen hammer to straighten it.
    • Check the rear brake pedal adjustment. Work the rear brake pedal back and forth by hand to determine the amount of free play before the pushrod contacts the piston in the master cylinder. Free play measured at the pushrod should be app. 1/16“.
  • Correction:
    • If free play is excessive, inspect the clevis rod end (42445-80) for signs of distortion. If it is bent at the end, replace it.
    • If free play is incorrect, loosen the jamnut and turn the ad­justing screw in (clockwise) to increase free play, or out (counterclockwise) to decrease free play.
  • When proper free play is achieved , apply Harley­ Davidson Lock 'N Seal (99625-77) to the threads and then tighten the jamnut to 12-15 ft-lbs. while holding the screw in position.
  • When properly adjusted, the brake pedal should be parallel to the ground when bottomed against brake pedal stop.

* . . . Fabricating a Brake Pedal Stop

Front Caliper

• Banana
  • 1973 XL, FX Models
  • 1972-1984 FL Models
• Clebrake
  • 1974-1977 XL, FX (single disc)
• Large Kelsey Hayes
  • 1980-1983 FLT, FLHT
• Small Kelsey-Hayes
  • 1977-1979 FXS
  • 1978-1983 FX, XL
• Semi Torque Free
  • 1983-1985 XR1000
  • 1984-up All models except FLH
  • 1985 All models

Rear Caliper

• Banana
  • 1973-1982 FX
  • 1973-1983 FXE
  • 1973-1980 FL
• Large Kelsey Hayes
  • 1977-1978 XLCR
  • 1979-1981 XL
• Dual Piston Kelsey Hayes
  • 1981-1984 FL
  • 1980-1985 FLT, FLHT
• Single Piston Kelsey Hayes
  • 86-up FLT, FLHT, 87 1/2-up all BT models
• Lucas Girling
  • 1982-E1987 XL,FXR
  • 1983-1986 FXWG
  • 1984-1985 FXE, FXSB
  • 1984-E1987 FXST
  • 1983-1984 and 1987 FLHS

Disc and pad sets