The defect
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.
The remedy
DEALER WILL INSPECT AND, IF NECESSARY, REPLACE THE FRONT BRAKE MASTER CYLINDER ASSEMBLY AT NO COST TO OWNER.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|
Components: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER
Other service brakes, hydraulic recalls in 1978
14 of the 272 recall campaigns reported to NHTSA in 1978 concerned the service brakes, hydraulic; HARLEY-DAVIDSON MOTOR CO. filed 87 campaigns in all.
| 78V261000 11 Dec 1978 | VOLKSWAGEN OF AMERICA,INC |
| 78V254000 20 Nov 1978 | VOLVO OF AMERICA CORP. |
| 78V247000 13 Nov 1978 | GENERAL MOTORS CORP. |
| 78V199000 11 Sept 1978 | FORD MOTOR COMPANY |
| 78V188000 29 Aug 1978 | CHRYSLER CORPORATION |
| 78V184000 18 Aug 1978 | AMERICAN GARELLI EAST,LTD |
| 78V178000 16 Aug 1978 | PEUGEOT, INC. |
| 78V123000 2 Jun 1978 | PORSCHE CARS N.A. INC. |
NHTSA recalls (public domain) · all recalls of 1978