The heat expansion could cause potential failure of the headlight, which would reduce visibility of the motorcycle to oncoming traffic and increasing the risk of a crash.
According to the NHTSA, use of the headlight in the affected motorcycles may generate enough heat to cause arcing in the headlight bulb socket and the resulting heat could cause the headlight to melt and malfunction.
A letter from Yamaha USA to the Chief Administrator of the NHTSA stated “We anticipate commencing dealer/owner notification shortly after the owner’s notification letter is approved by NHTSA, the affected VIN range is ascertained and the Technical Bulletin service procedure is confirmed and finalized by Yamaha service staff. We anticipate sending the Agency the owner’s notification letter for review/approval by February 19, 2014 along with a draft of the Technical Bulletin.”
Yamaha will be notifying owners, and dealers and will be replacing the lightbulb socket free of charge. The recall is expected to begin in February 2014. Owners may contact Yamaha at 1-800-962-7926 or the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236.
Full details of the recall including all supporting documents can be found here.