Hearth Record

Service brakes, hydraulic: foundation components: master cylinder (Harley-Davidson)

Vehicle recall 77V-164. NHTSA received HARLEY-DAVIDSON MOTOR CO.’s report on Sep 28, 1977.

NHTSA’s own record, on nhtsa.gov

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The short answer

NHTSA received HARLEY-DAVIDSON MOTOR CO.’s report on Sep 28, 1977. Copied from NHTSA on Oct 24, 2026.

Every line below is in NHTSA’s own words, with its source beside it.

What’s wrong with it?

The notice gives no hazard in a field of its own.

AN INCORRECT O-RING MAY HAVE BEEN INSTALLED IN THE REAR BRAKE MASTER CYLINDER.

THIS COULD ALLOW AIR LEAKAGE INTO THE REAR BRAKE SYSTEM, POSSIBLY RESULTING IN LOSS OF REAR BRAKING EFFECTIVENESS.

Source:

NHTSA, Recalls flat file before 2010. Released Oct 24, 2026. Updated daily.

  • NHTSA’s part: Service brakes, hydraulic: foundation components: master cylinder.

What should you do?

DEALER WILL INSPECT AND, IF NECESSARY, INSTALL THE CORRECT MASTER CYLINDER O-RING WITHOUT CHARGE TO OWNER.

Source:

NHTSA, Recalls flat file before 2010. Released Oct 24, 2026. Updated daily.

  • How to reach the firm: VEHICLE DESCRIPTION: MOTORCYCLES.SYSTEM: SERVICE BRAKES; MASTER CYLINDER, O-RING.CONSEQUENCES OF DEFECT: LOSS OF REAR BRAKES COULD OCCUR WITHOUT PRIOR WARNINGAND COULD LEAD TO A LOSS OF VEHICLE CONTROL AND AN ACCIDENT.
  • Check a vehicle by its VIN at NHTSA: the recalls still open on it are listed there.

Which ones are recalled?

NHTSA counts 385 vehicles potentially involved, across everything this recall names.

Source:

NHTSA, Recalls flat file before 2010. Released Oct 24, 2026. Updated daily.

  • Harley-Davidson 1200CC FXEand 1978, before the model years listed here
  • Harley-Davidson 1200CC FXSSand 1978, before the model years listed here
  • Harley-Davidson 1200CC FXand 1978, before the model years listed here

Who is recalling it?

  • Made by HARLEY-DAVIDSON MOTOR CO..
Source:

NHTSA, Recalls flat file before 2010. Released Oct 24, 2026. Updated daily.

What the record doesn’t say

  • NHTSA’s recall file doesn’t say whether anyone was hurt.
  • Whether one vehicle or seat has been fixed: only its maker, or NHTSA’s lookup with a VIN, can say.
  • This recall names only model years before 2015, which have no pages here. Your VIN, at NHTSA, says which recalls are open on a vehicle.
  • How many have been returned or fixed isn’t in the notice.
Source:

Hearth Record wrote these lines.

Sources

Source:

Vehicle, car seat, tire and vehicle equipment recalls, owner complaints and crash ratings are from the National Highway Traffic Safety Administration (NHTSA). Copied on Oct 24, 2026.

How to read a record

Four things every record does, shown on an example record made up for this guide.

An example record, made up for this guide

An example nursing home

Made up for this guide: no real place is shown

Not fully inspected in over two years (CMS flag)

11 health citations at the latest inspection cycle

The state average is 14.3.

Source:

CMS, State and US Averages and Health Deficiencies. Released Oct 28, 2026. Updated monthly.

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Every fact names its source.

Who published it, when, and how often it changes sit beside each fact, with a link to the agency’s own file.

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