POWWERFUL PERFORMANCE
Yamaha’s new F40A features a vapor-reducing fuel return
system. Used in conjunction with Yamaha’s electronic
multi-point fuel injection, the F40A offers dependable
turn-key starting in both hot and cold conditions.
A single overhead camshaft provides precise valve timing
for maximum power with minimum weight. This 6-valve,
SOHC design effi ciently exchanges intake and exhaust
gases for responsive power and fuel effi ciency.
Responsive Power
Precise Throttle Control
Fuel Effi ciency
Three individual compact electronic fuel injectors deliver the
exact amount of fuel needed for optimum performance and
economy. Controlled by the Engine Control Module via input
from an array of on-engine sensors, their location just above
the intake valves enhances fuel atomization, resulting in
more effi cient combustion.
Dependable Starting
All air entering the engine block of the F40A is routed through
a single throttle valve, to ensure the precise amount of air
necessary for optimum power and fuel effi ciency. The air
silencer box reduces intake noise and air turbulence for
smooth, quiet operation.
F40A HOT SHEET
F40A HOT SHEET