HARLEY-DAVIDSON MILWAUKEE EIGHT
FIRST RIDE
P92
engine control. The precision
cooling of the engine is allow-
ing us to have this really high-
functional, four-valve cylinder
head. It allows us to run as far
advanced as possible so we're
not creating heat by returning
the spark to keep ourselves
away from detonation. To do that
we put individual cylinder knock
sensors in, and the throttle body
now stands at 55mm
versus the 50mm of
the old engine. So
now our exhaust gas
temps are much lower
(around 100 degrees
lower), the pipes are
a lower temperature,
the heads are a lower
temperature and the overall ride
is cooler."
The four-valve head
means there's 50 percent
more intake and exhaust
flow capacity and with the
use of hydraulic lifters,
valve adjustments are a
thing of the past, accord-
ing to Bozmoski. There's
also no left-right adjust-
ment on the intake or exhaust.
"Putting the adjustment in
The new-found
low-down torque
and super
smooth throttle
response were a
welcome addition
to the Ultra
Limited ride.
