The block-clutch has brake-blocks held inside a cilynder with springs. When the revs rise the centrifugal forces stretch out the springs and the blocks get grip on the cilynder. How the variator works exactly I don't know. It allows the engine to run steady at the revs where you have the most power, it works like a CVT. You can buy the block-clutch in any mopedstore, most peds use block-clutches in stead of plate-clutches. Plate-clutches are better though. You can buy a variator at stores with racingparts, I believe Polini has a good variator. Most modern scooters like the DJ Kymco have variators. Try the Vespa dealer.
RE: Worn clutch plate
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