STM

STM

 

Thanks to the technological strength built and confirmed over the years, STM ITALY SRL has deemed necessary a change in the marketing-commercial-R & D, to push the STM brand "Selection of Mechanical Technologies" towards new important objectives. The Vision of STM ITALY will be the same as always: to be a leader in the anti-friction sector, anticipating the future. This will allow us to provide both innovative solutions to the professionals of MotoGP, WSBK, MOTOCROSS and SUPERMOTARD, and the best production quality with the best materials for increasingly high performance and innovative products on the world market And not only. We will also expand the range of our aftermarket products with new products rich in unprecedented solutions. The objective of STM ITALY will therefore be KAIZEN, that is continuous business improvement, recalling the Company's history, maintaining its merits and resolving its defects. "Historia eST Magistra vitae" - History is a teacher of life.




Manufacturer of Slipper Clutch


Ducati Superleggera with STM dry clutch


BMW S1000RR equipped with STM Dry Clutch Conversation


Heart of the STM Slipper Clutch...

Primary Spring:

  • pressure action on the DISC PACK through the pressure plate.
  • function of coil springs.

Secondary spring:

  • pressure action on the DRUM.
  • it is used to adjust the opening of the clutch during the anti-skid, then to adjust the engine brake.

How the springs work
The primary and secondary springs are mounted in such a way as to guarantee a preload which generates an initial resilient spring force.

How the primary spring works
When the lever is actuated, the preloading position of the primary spring is varied and reduced. The spring returns an elastic force of contrast to the action of the lever.

How the secondary spring works
The torque generated by the rear wheel tends to raise the drum. The secondary spring is compressed with respect to the initial resting position and generates an elastic contrast force.




The Clutch 'La Frizione'...


Motobull - approved dealer for STM
We can supply the full range of STM wet and dry slipper clutch kits, plus STM clutch tools, springs and accessories.
All at competitive prices!
We can also provide technical advice.

Products available:

  • BMW CONVERSION KITS
  • DUCATI CONVERSION KITS
  • DUCATI DRY CLUTCHES
  • DUCATI WET SLIPPER CLUTCHES
  • DUCATI CLUTCH ACCESSORIES
  • WET SLIPPER CLUTCHES
    • Aprilia
    • BMW
    • Harley Davidson
    • Honda
    • Kawasaki
    • KTM
    • MV Agusta
    • Suzuki
    • Triumph
    • Yamaha

We can also supply CLG OFF ROAD CLUTCHES, AUDAX OFF ROAD CLUTCHES, SDS SUPER DRY SYSTEM CLUTCHES, SUPERMOTARD SLIPPER CLUTCHES and PIT BIKE CLUTCHES

If you cannot see the parts for your bike in the web store please give us a call on +44 (0)151 345 6490, we're only too happy to help
...or chat on Facebook Facebook facebook.com/motobullparts
...or Contact Us


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  1. STM Evo GP Dry Slipper Clutch Conversion Kit BMW S1000RR / R / XR - KTT-1300
    Special Price £2,776.90 £2,314.08 Regular Price £3,225.00
  2. STM Slipper Clutch APRILIA RS 660 FAP-S060
    Special Price £854.95 £712.46 Regular Price £1,026.00
  3. STM Slipper Clutch APRILIA RSV4 / Tuono FAP-S040
    Special Price £854.95 £712.46 Regular Price £1,026.00
  4. STM Slipper Clutch BMW M1000RR 2023 FBM-S020
    Special Price £854.95 £712.46 Regular Price £1,026.00
  5. STM Slipper Clutch BMW S1000RR FBM-S020 / FBM-S021
    Special Price £854.95 £712.46 Regular Price £1,026.00
  6. STM Slipper Clutch DUCATI 1199 PANIGALE - FDU-S050
    Special Price £854.95 £712.46 Regular Price £1,026.00
  7. STM Slipper Clutch DUCATI 1299 PANIGALE - FDU-S050
    Special Price £854.95 £712.46 Regular Price £1,026.00
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