STM ITALY Ducati Monster S4/S4R/S4RS Slipper Clutch EVO 90 mm
Slipper clutch by STM Italy for Ducati Monster S4 / S4R / S4RS.
The vision of STM ITALY will always be the same: being the leader in the slipper clutches sector anticipating the future. This will affords to provide as well innovative solutions to the professionals of MotoGP and WSBK, as the best productive quality with equipment more and more performing and technological to the worldwide market.
Springs functioning: the primary and secondary springs are pre-loaded in order to generate an initial elastic strength of contrast.
- makes pressure on the disc pack through the pressure plate
- replaces the helicoidal springs
Primary spring functioning: when you operate clutch lever, the primary spring is compressed. The spring releases an elastic strength of contrast to the lever movement. The next chart shows how the spring load varies with its compression.
- makes pressure on the drum
- regulates the opening of the slipper clutch and regulates the engine brake
Secondary spring functioning: the engine brake makes the drum rotate and shift outwards causing the discs to disengage. The secondary spring is compressed in comparison with the initial resting position and generates an elastic strength of contrast.
📦 Equipped with EVOLUZIONE slipper clutch with Z48 basket and plates set, 90 mm diaphragm.
Ducati MONSTER S4 (2002 – 2003)
Ducati MONSTER S4R (2003 – 2006)
Ducati MONSTER S4R Testastretta (2006 – 2008)
Ducati MONSTER S4RS Testastretta (2006 – 2008)