QUICKSPIN I 2023 Yamaha YZ450F
P92
intake valves, a new forged
aluminum piston, a new
cylinder, crankshaft and
balancer assembly, and a
new dry-sump (formerly wet-
sump) lubrication system.
Yamaha chose to stick with
a cable-actuated clutch that
now features a disc spring
and integrates the primary
gear and basket into a single
steel unit. This design ditches
the old-school multi-spring
design for a single cone-
spring system, similar to what
KTM has been successfully
using the past few years.
There are several benefits,
according to Yamaha—the
single-spring design is lighter
and more compact, and it im-
proves engagement and feel
for the rider. While the bike
comes stock with the cable
clutch, a GYTR hydraulic op-
tion will soon be available for
purchase.
Yamaha has given the
five-speed gearbox a new
tri-shaft layout that vertically
stacks the transmission
shafts. The center shaft
has been raised, forming a
triangle between the crank,
drive shaft and main shaft.
The result, Yamaha claims,
Yamaha made the
YZ450F significantly
slimmer, and the
air intake noise has
been squelched
considerably.
Engine mode can now be adjusted on the fly.
