Vespas use nipples on clutch and brake cables and they don't slip. I just bought half a dozen cables with adjustable nipples for £14 posted.
Light clutch springs to match the engine torque, so not as much strain as a bigger bike. Not sure what size engine casa is riding. edit - see it's a 125, shouldn't be an issue then I guess.
@Sparky started
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Vespas use nipples on clutch and brake cables and they don't slip. I just bought half a dozen cables with adjustable nipples for £14 posted.