Mirrors; Spring Preload - BMW HP4 Rider's Manual

Mirrors

4
Adjusting mirrors
52
z
Turn the mirror to the correct
position.

Spring preload

Adjustment
Front spring preload has to
be adjusted to suit the rider's
weight. Increase spring preload
for heavier riders, decrease
spring preload for lighter riders.
It is essential to set spring pre-
load of the rear suspension to
suit the load carried by the mo-
torcycle. Increase spring pre-
load when the vehicle is heavily
loaded and reduce spring preload
accordingly when the vehicle is
lightly loaded.
Adjusting spring preload
for front wheel
Make sure the ground is level
and firm and place the motor-
cycle on its stand.
Make sure there is no load
on the motorcycle; remove all
items of luggage, if carried.
Start the engine and leave it
running in neutral.
Hold the motorcycle upright
and measure distance d from
bottom edge 1 of the slider
tube to front axle 2.
Apply the rider's weight to the
motorcycle.
With the assistance of a
second person, measure
distance d between points 1
and 2 again and calculate the
difference (negative spring
displacement) between the two
readings.