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Service bulletin GL1800 SECONDARY

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10099350
Published by NHTSA2017-05-17
Manufacturer's numberGL1800 SECONDARY
Manufacturer's date2015-12-11
NHTSA componentSERVICE BRAKES, HYDRAULIC:FLUID

NHTSA's summary

"SERVICE BULLETIN - HONDA IS LAUNCHING A SAFETY RECALL OF 2012-2015 GL1800/A AND 2013-2015 GL1800B/BD MOTORCYCLES, AND IS IMPLEMENTING A RECALL REMEDY FOR 2001-2010 AND 2012 GL1800/A MOTORCYCLES ALREADY SUBJECT TO SAFETY RECALL “JG6”. HONDA HAS DETERMINED THAT UNDER CONDITIONS WHERE THE BRAKE FLUID IS SUBJECT TO PROLONGED AGING DUE TO A LACK OF MAINTENANCE (I.E., THE BRAKE FLUID IS NOT REPLACED FOR A LONG PERIOD OF TIME DESPITE THE PUBLISHED MAINTENANCE SCHEDULE OF REPLACEMENT EVERY 12,000 MILES OR TWO YEARS, WHICHEVER COMES FIRST), DEPOSITS MAY FORM WITHIN THE BRAKE FLUID. IF SUFFICIENT DEPOSITS ARE FORMED, THEY CAN RESULT IN A MALFUNCTION OF THE SECONDARY MASTER CYLINDER, WHICH MAY CAUSE THE REAR BRAKE TO DRAG."

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Brakes, Brake fluid

Vehicles listed
HONDA GL18002001 to 2015
HONDA GL1800A2001 to 2015
HONDA GL1800B2013 to 2015
HONDA GL1800BD2013 to 2015

Listing a model year does not mean every vehicle of it is concerned: the document says which.