Clutches for Vespa & Lambretta - at SIP Scootershop
Clutches are one, if not the most important component of an engine and ensure the frictional connection between the crankshaft and the gearbox. In order to be able to transmit more power, higher friction is required in the clutch. Stronger springs lead to more contact pressure, more linings to a larger friction surface. All clutch facings can be combined with the reinforced springs that match the engine type. Here you will find clutches for every model and every requirement: Race, Sport and Standard.
What does the clutch do?
On a Vespa, the driving force of the crankshaft is transmitted to the gearbox by a wet clutch system. The clutch has several tasks: Firstly - and this is important for a smooth shifting process - it separates the drive (i.e.: the rotating crankshaft) from the gearbox so that no torque is transmitted to the rear wheel when the clutch lever is pulled. On the other hand, the clutch can be used to regulate the torque transmission when starting off. The driver uses the clutch progressively ("lets it come") and doses the power that is actually transmitted to the rear wheel by how far he pulls the clutch lever. The difference in speed between the friction discs times the torque is, physically speaking, work that is converted into frictional heat. This is initially stored in the clutch and gradually distributed to its surroundings, including the transmission oil. The advantages of such a wet clutch compared to a dry clutch include better heat dissipation and good protection against external influences such as dirt and water.
How do I find the right clutch for me?
To avoid being overwhelmed by the variety of articles, we suggest that you narrow down your search. For example, if you enter "Classic Vespa" at the top of the category, the display will be reduced to the parts that come into question for these scooters. Later, you can even narrow down the selection to your exact model, for example "Vespa PX/T5/Cosa".