Tires - BMW HP4 Rider's Manual

Load motorcycle with driver.
With the assistance of a helper,
measure distance d between
points 1 and 2 again and cal-
culate difference (spring deflec-
tion) between the measured
values.
Adjustment of spring
preload dependent on
loading
Compression of rear-wheel
springs
0.31...0.47 in (8...12 mm) (With
rider 187 lbs (85 kg))
To decrease spring deflection
(increase spring preload), turn
hexagon 3 with tool of onboard
tool kit in direction A.
To decrease spring deflection
(decrease spring preload), turn
hexagon 3 with tool of onboard
tool kit in direction B.

Tires

Checking tire pressure
Incorrect tire inflation pres-
sure results in poorer hand-
ing characteristics of the motor-
cycle and reduces the life of the

tires.

Ensure proper tire inflation
pressure.
At high road speeds, tire
valves have a tendency to
open as a result of centrifugal
force.
Use valve caps with rubber seals
and screw them on firmly to pre-
vent sudden tire deflation.
Make sure ground is level and
firm and park motorcycle.
Check tire pressures against
data below.
Tire pressure, front
36.3 psi (2.5 bar) (With tire
cold)
Tire pressure, rear
42.1 psi (2.9 bar) (With tire
cold)
4
53
z