Surprisingly, Yamaha tells us that
YZ owners are still slowly warming
up to the app idea despite it being
free and beneficial in so many ways,
not just engine tuning. You can also
use the app as an engine/main-
tenance logbook and run engine
diagnostics. Yamaha tells us some
people are worried about damaging
the motor and are afraid to use it,
but Yamaha says the app has been
programmed not to let that happen.
2021 YAMAHA YZ450F
R I D E R E V I E W
P90
