NHTSA recall 80V040000
Fuel system, gasoline › Delivery › Fuel pump
Yamaha XS400 and 2 more
The defect
The fuel petcock, which controls the fuel supply from the gas tank to the carburetor, may be defective. The involved petcock contains a rubber diaphragm. In the event that a hole develops, fuel may be misdirected and may manifest itself in a fuel leak in the petcock housing.
The remedy
Dealer will install an improved fuel petcock without charge to owner.