VOLUME ISSUE MARCH , P97
to make it a little easier to ride,
and we hoped it would also
reduce flameouts, so we hit up
the Yamaha techs for some
tuning advice via Yamaha's
smartphone Power Tuner App.
They suggested adding fuel and
advancing the ignition timing,
Some bikes are more suscep-
tible to flameouts than others
and we experienced a fair share
with the FX.
After riding the YZ450FX
out of the box for a while, we
wanted to see if we could
"mellow" out the power a bit
the bumped-up rev limiter, the
rpm and power continue to de-
liver as the speeds climb.
Unfortunately, the YZ450FX is
not immune to the dreaded big-
bore four-stroke flameout, which
tends to happen when rpm is
too low while in too high a gear.
(Top) Like the
YZ450F, the FX is
slimmer between
your legs. (Middle)
The engine (and
aluminum frame) is
all new. It now gives
you 500 rpm more
over-rev and still
plenty of torque.
(Bottom) Yamaha
didn't let any open
space go to waste
to increase fuel
capacity.
It's hard to beat the FX's suspension.
