Malossi TORSION CONTROLLER for eng. 50 >100 cc YAMAHA - MINARELLI

TORSION CONTROLLER

Antifriction fifth wheel for variator contrast spring
A secret from Malossi racing department
Light, perfect: a technology extract in its simplicity.
Design and formula of the materials are registered.

Abstract from of Malossi Engineering R&D department archives

 

CVT Transmission systems

Chapter : contrast spring.

Goal

Pull down vibrations and to make the system operation stable at any rpm and temperature.

Design path

We have considered both on theoretical and practical basis all the existing fifth wheel systems: balls, rollers and radial sliding fifth wheels of metal type. All the tests gave unsatisfactory results. We have made prototypes with alternative systems, metallic type, without any positive results. Only after exhausting laboratory and racetrack tests we have eventually come to Torsion Controller design.

Thesis

The above-mentioned component solves the following problems.
During gear curve range the bushing of the movable pulley (torque drive) slides into the driven pulley in axial way along fixed pulley hub, making a small rotation which gives a torsion to the contrast spring. Sometimes the spring loses its position while frictioning on the shoe-holder plate, metal against
metal; some others, the spring remains stuck in its position causing some accidentally different contrast forces.
Second problem : centrifugal forces caused at high rpm affect the spring which consequently buckled and starts to veer as to create big vibrations, very annoying for the driver as well as dangerous for the engine and, above all, making unsteady the gear curve.

Result

We approved the project with great success after strict tests at R&D department and on racetrack on all examined scooter models.

Modellek:

• AEON MOTOR COBRA 50 2T (AT70)
• APRILIA SR 50 2T 1994->
• APRILIA AMICO 50 2T
• APRILIA AREA 51 50 2T LC
• APRILIA GULLIVER 50 2T LC
• APRILIA GULLIVER 50 2T
• APRILIA RALLY 50 2T (MINARELLI)
• APRILIA SR NETSCAPER 50 2T LC (MINARELLI)
• APRILIA RALLY 50 2T LC (MINARELLI)
• APRILIA SCARABEO 100 2T
• APRILIA SCARABEO 50 2T (MINARELLI)
• APRILIA SR RACING 50 2T LC (MINARELLI)
• APRILIA SONIC 50 2T
• APRILIA SONIC 50 2T LC
• APRILIA SR 50 2T <-1993
• APRILIA SR REPLICA 50 2T LC <-1999
• APRILIA SR STEALTH 50 2T LC (MINARELLI)
• APRILIA SR WWW 50 2T
• ATALA CAROSELLO 50 2T
• BENELLI 491 SPORT 50 2T LC (MINARELLI)
• BETA ARK 50 2T
• BETA ARK 50 2T LC
• BETA CHRONO 50 2T
• BETA EIKON 50 2T LC
• BENELLI 491 GT 50 2T (MINARELLI)
• BENELLI K2 100 2T
• BENELLI K2 50 2T
• BENELLI K2 50 2T LC
• BENELLI NAKED 50 2T
• BENELLI PEPE 50 2T
• BETA QUADRA 50 2T
• BETA TEMPO 50 2T
• BSV AX 50
• BSV GZ 50
• DRR DRX 90 2T LC <-2015
• DRR DRX 90 2T LC 2016->
• FANTIC BIG WHEEL 50 2T
• GARELLI GSP 50 2T LC euro 2 (1PE40MB)
• GARELLI SR 50 2T
• ITALJET DRAGSTER 50 2T LC
• ITALJET MILLENNIUM 100 2T
• ITALJET PISTA 2 50 2T
• ITALJET SCOOP 50 2T
• ITALJET YANKEE 50 2T
• MALAGUTI F10 50 2T
• MALAGUTI F12-PHANTOM 50 2T
• MALAGUTI CENTRO 50 2T
• MALAGUTI CIAK 50 2T
• MALAGUTI F15 FIREFOX 50 2T LC
• MALAGUTI F12 DIGIT KAT-PHANTOM 50 2T LC
• MALAGUTI F12 DIGIT KAT-PHANTOM 50 2T LC euro 2
• MALAGUTI F12-PHANTOM 50 2T LC
• MALAGUTI F12 R LC 50 2T LC euro 2
• MALAGUTI YESTERDAY 50 2T
• MBK BOOSTER 100 2T
• MBK BOOSTER 50 2T euro 0-1
• MBK BOOSTER 50 2T euro 2 (A137E)
• MBK BOOSTER SPIRIT 50 2T euro 0-1
• MBK EVOLIS 50 2T
• MBK FIZZ 50 2T
• MBK FLIPPER 50 2T
• MBK FORTE 50 2T
• MBK HOT CHAMP 50 2T
• MBK MACH G 50 2T
• MBK MACH G 50 2T LC
• MBK BOOSTER NAKED 50 2T euro 2 (A137E)
• MBK NITRO 100 2T
• MBK NITRO 50 2T LC
• MBK BOOSTER NG 50 2T euro 0-1
• MBK BOOSTER NG 50 2T euro 2 (A137E)
• MBK OVETTO 100 2T
• MBK OVETTO 50 2T
• MBK BOOSTER ROCKET 50 2T euro 0-1
• MBK BOOSTER ROCKET 50 2T euro 2 (A137E)
• MBK SORRISO 50 2T 1996->
• MBK STUNT 50 2T euro 0-1
• MBK STUNT 50 2T euro 2
• MBK TARGET 50 2T
• MOTRON SYNCRO 50
• MOTRON THUNDER'S 50
• YAMAHA AEROX 100 2T
• YAMAHA AEROX 50 2T LC euro 0-1
• YAMAHA AEROX 50 2T LC euro 2
• YAMAHA AXIS 50 2T
• YAMAHA BREEZE 50 2T
• YAMAHA BW'S 100 2T
• YAMAHA BW'S 50 2T euro 0-1
• YAMAHA BW'S 50 2T euro 2 (A137E)
• YAMAHA BW'S Original/Naked 50 2T euro 2 2010-> (A137E)
• YAMAHA BW'S NG 50 2T euro 0-1
• YAMAHA BW'S NG 50 2T euro 2 (A137E)
• YAMAHA CRZ 50 2T
• YAMAHA JOG ER 50 2T
• YAMAHA JOG 50 2T
• YAMAHA JOG R 50 2T
• YAMAHA JOGRR 50 2T LC euro 2
• YAMAHA JOG Z 50 2T
• YAMAHA NEO'S 100 2T
• YAMAHA NEO'S 50 2T
• YAMAHA SLIDER 50 2T
• YAMAHA SPY 50 2T
• YAMAHA VINO 50 2T
• YAMAHA WHY 50 2T
• YAMAHA ZEST 50 2T
• YAMAHA ZUMA 50 2T