HARLEY-DAVIDSON FLH80 1978: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER

General Information

NHTSA Campaign ID Number: 78V159000

Make Model Year
HARLEY-DAVIDSON FLH80 1978
Date Owners Notified Date Received by ODI Date Added to Database
1978-08-11 1978-07-19 1979-10-12

Production Dates: 1978-06-01 - 1978-06-01

Manufacturers Involved: Harley-Davidson Motor Company

Component: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER

Potential Number Of Units Affected: 342

Report Initiator: MFR MFR Report

Summary

THE INVOLVED MOTORCYCLES WERE MANUFACTURED WITH FRONT BRAKE MASTER CYLINDERS IN WHICH THE PLUNGER PISTON BORE DIAMETER WAS HONED .015 INCHES OVER MAXIMUM SPECIFICATIONS. THIS OVERSIZED BORE RESULTS IN A POOR FIT BETWEEN THE ELASTOMERIC PISTON CUP AND THE CYLINDER BORE, WHICH ALLOWS FLUID LEAKAGE FROM THE HYDRAULIC SYSTEM.

Remedy

DEALER WILL INSPECT AND, IF NECESSARY, REPLACE THE FRONT BRAKE MASTER CYLINDER ASSEMBLY AT NO COST TO OWNER.

Notes

VEHICLE DESCRIPTION: MOTORCYCLES.SYSTEM: SERVICE BRAKES; HYDRAULIC SYSTEM.CONSEQUENCES OF DEFECT: FLUID DEPLETION COULD RESULT IN LOSS OF BRAKINGEFFECTIVENESS, LOSS OF VEHICLE CONTROL, AND AN ACCIDENT.NOTE: INSUFFICIENT BRAKE FLUID IN THE SYSTEM MAY BE INDICATED BY FLUID LEAKAGEAROUND THE MASTER CYLINDER AND INCREASED FREE PLAY IN THE HAND LEVER.