NHTSA Complaint #10236964 — 2007 YAMAHA FJR13

WHEN THE ENGINE IS DECELERATING OR BRAKING FUEL IS TURNED OFF AND WHEN TRYING TO ACCELERATE AGAIN THERE IS A DELAY IN FUEL DELIVERY. WHEN TRYING TO ENTER A HIGHWAY FROM THE RAMP YOU DECELERATE TO TIME YOUR ENTRANCE AND WHEN YOU ACCELERATE THE MOTORCYCLE PAUSES THEN LURCHES FORWARD EFFECTING YOUR MERGE INTO SPEEDING TRAFFIC. THIS ALSO HAPPENS TO A SMALLER DEGREE ON EACH SHIFT OF THE TRANSMISSION. IT APPEARS THAT AN AIR PRESSURE SENSOR IN THE INTAKE MANIFOLD PREVENTS THE FLOW OF FUEL DURING INCREASED VACUUM AND THAT THE FUEL IS NOT TURNED ON AGAIN UNTIL THE VACUUM IS REDUCED BY AN OPEN THROTTLE. YOU OPEN THE THROTTLE, THE VACUUM GOES DOWN THE FUEL TURNS ON AND THE MOTORCYCLE LURCHES FORWARD. *TR