8
OPEN BATH
RV Pos.
The RV (Rebound Valve) pumping element is the evolution of the well-proven SSVF
Open Bath system. This system controls the rebound speed. If you correctly adjust the
red-coloured knob on the lower part of the fork leg, you can keep the wheel on contact
with the soil in all riding conditions.
>
red Rebound
SEALED
TST MICRO (Terrain Selection Technology With Micro Adjuster) Pos.
TST Micro is the greatest evolution of TST closed cartridge hydraulic systems. The red
knob installed in the lower part of the fork leg adjusts the rebound. The black-coloured top
knob sets Micro System to adjust the compression. The Micro adjustment (golden knob
on the top of the fork leg) sets the operating threshold of compression by adapting the
behaviour of the suspension system to the type of terrain. Lockout is activated by turning
the golden knob completely in the closed position, then shifting the red lever. In some
models, the TST system can be operated through the remote control on the handlebar.
>>
gold Compression/ Blow Off
>
black Lockout
>
red Rebound
AIR SYSTEMS
AER Pos.
By means of a single Schrader air valve in the upper or lower part of the fork leg,
depending on the model, the AER pneumatic cartridge allows a perfect and simple
adjustment of the pressure in the positive air chamber.
>
Ti grey Air spring
STA (Switch-TA) Pos.
The STA cartridge has the functionalities of the AER system. It allows easy setting by
means of a single air valve installed in the lower part of the fork leg. In addition, the
STA cartridge, by means of the rotation of the Silver-coloured STA knob installed on
the top of the fork leg, allows adjustment of the fork height and travel without affecting
the damping system.
>
Smoke
grey
Travel adjust
>
Ti grey Air spring
SPRING PRELOAD Pos.
Coil preload with mechanical adjuster
>
Ti grey Spring preload
Coil preload with air
>
Ti grey Spring preload
Table 2 - Technology and Adjustment - Detail
2.3 Lubrication and cooling
The forks can use different lubrication and cooling technologies.
In Open Bath systems, the oil inside the fork leg, besides being a
crucial element for the hydraulic operation, accomplishes all cooling
and lubrication needs for the internal sliding parts. In addition, if
the oil volume is varied within the recommended ranges, it will
be an additional setting element, thus allowing the modifi cation
of suspension system’s progressivity. Compared to the systems
equipped with sealed cartridges, the Open Bath system allows
increased lubrication for the operation of the sliding parts.
The Open Bath system assures an excellent lubrication from the very fi rst
“bottoming” of the fork, as well as in all use and weather conditions.
In the systems equipped with sealed cartridge, special grease or oil
is used for the lubrication of the internal sliding parts. The aforesaid
lubricant does not work as additional setting element; therefore, the
pre-established levels must be carefully observed.
The best lubrication of the internal parts is achieved during use,
when the stress and the bottoming of the fork allow the oil to lift
due to “chattering” from the bottom of the fork leg until reaching
and lubricating the bushings.
2.4 Sliding bushing and oil seals
The guide of the stanchion tubes inside the sliders is formed by
two bushings utilizing an advanced Tefl on® facing, with very low
static friction.
In 44, 350, 55, 380, 888, 320, Corsa and Marathon models the
notorious smoothness of Bomber models has been increased
further, thanks to the use of these newly designed bushings
and seals offering a coeffi cient of friction that is 30% lower than
previously obtainable. These new bushings and seals have proven
to give better consistent performance over time. This allows the
optimum combination between the fork legs and the sliders. The
new bushings have slots that help the oil to go up and improve
the lubrication, thus offering an incomparable smoothness. At the
top end of the monolite, there is a sealing group that prevents oil
leakages, as well as the access of contaminating agents into the
lubricant and into the hydraulic cartridges.
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