American Honda Motor Co., Inc. has notified the National Highway Traffic Safety Administration (NHTSA) that a potential defect relating to motor vehicle safety exists in the secondary master cylinder on certain 2001-2010 and 2012 model year GL1800 motorcycles. 

Situation: 
The compensating port hole inside the secondary master cylinder (part of the combined-braking system) can become blocked due to (1) stacking of tolerances in manufacturing and (2) sufficient swelling of the primary pressure cup inside the master cylinder. If the compensating port hole becomes completely blocked, the rear wheel brake caliper can drag after the rider releases the brake input. If this occurs, the rear brake temperature and pressure progressively increase. Unexpected braking increases the risk of a crash and continued riding with the brake engaged can generate enough heat to cause the rear brake to catch fire. 

Inspection and Repair: 
Diamond Motor Sports will inspect the secondary master cylinder of any affected motorcycles brought to our dealership. If an inspection indicates that the compensator port hole can become blocked due to this problem, Diamond Motor Sports will replace the secondary master cylinder. Registered owners of affected motorcycles will be contacted by mail by Honda and asked to take their motorcycle to a Honda dealer such as Diamond Motor Sports.  Diamond Motor Sports will inspect your motorcycle, and if necessary, replace the secondary master cylinder, free of charge. 

Additional Details: 
Honda motorcycle dealers such as Diamond Motor Sports will immediately receive a transmittal of complete repair instructions. Replacement secondary master cylinders in the U.S. will initially be made available through American Honda's dealer technical support hotline. Upon approval by NHTSA, American Honda will mail a letter to all registered owners, and also post a copy of the letter on the Honda Brand website: powersports.honda.com. Target dates for website posting are before the end of December 2011, and mail receipt by registered customers should occur before the end of January 2012. 

Honda apologizes for any inconvenience this creates, but feels the safety of our customers is the highest priority. Honda encourages every customer to contact their dealer to schedule an appointment upon receiving the SAFETY RECALL letter.