DONT DO A SCOOTER CLUTCH
won't work. Tried it.
It's not meant for crank mount. Will engage at low Rpms even with super strong springs. It's meant to spin and engage at 1/3 the crank speed.
Just cut a new taper in the pa1 clutch to fit the derbi crank. I've never destroyed a hobbit clutch and I run em at 8k all the time