VEHICLE DESCRIPTION: MOTORCYCLES (VN1500-J1/L) EQUIPPED WITH A DIGITAL FUEL INJECTION SYSTEM AND A VEHICLE-DOWN SENSOR. THIS FEATURE IS DESIGNED TO PREVENT THE FUEL INJECTION SYSTEM FROM CONTINUING TO PUMP FUEL IF THE MOTORCYCLE FALLS DOWN, BY SHUTTING OFF THE IGNITION AND FUEL INJECTION PUMP. DURING BATTERY MAINTENANCE, THE VEHICLE-DOWN SENSOR CAN BE DISLODGED FROM ITS NORMAL MOUNTED POSITION. IF THE SENSOR IS OUT OF POSITION, THE MOTORCYCLE MAY NOT START OR MAY STALL DURING CERTAIN DRIVING MANEUVERS.