Pro-Arm Type; Damper Design And Operation - Honda Motorcycle Service Manual

REAR SUSPENSION
This arrangement offers a greater amount of suspension
stroke compared to the amount the damper unit compresses
and, therefore, greater control for improved suspension
performence. It also enables the weight of the springldamper
unit to be centralized more compactly, nearer the center o f the
frame.
The Delta type Pro-Link is a further refinement which lowers
the motorcycle's CG by a significant amount, and reduces the
weight of the cushion arm
Pro-Arm Type
Honda's unique cantilever-type Pro-Arm is
a
functional and
stylish departure from the conventional forked-type
swingarms. High rigidity and durability are achieved through
the use of a massive box-section design and large diameter
"axle". The "center pin"mounting allows easy wheel removal/
installation, and the design of the eccentric bearing carrier
makes chain adjusting easy and wheel alignment foolproof.
Other benefits include minimal unsprung weight, added room
for compact exhause routing, slimmer overall machine shape,
easier access for damper adjustments, and the simple desiogn
lends itself to ease of maintenance and cleaning.
Damper Design and Operation
Riding comfort and proper rear wheel traction are provided by
a combination springidamper unit, and to some degree, by
maintaining proper tire pressure. The damper absorbs some
suspension compression force and controls the unwanted re-
bounding effects of the spring. Typically, comparatively little
damping resistance is offered on the compression stroke as
most of this (shock) is handled by the spring.
Oil dampers units are either the upside down type or the right
side up type. Running the damper body upside down (with the
shaft below and the body above) reduces unsprung weight.
t
DAMPER ACTION
DAMPER OIL COMPRESSED
I
DAMPER
Vibration
Vibration
(spring and
damper)
1
v -
Upside down Right side up
type type
Date of Issue: March, 1995
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HONDA MOTOR CO..LTD