BMax2 squealing on set-off - presume this is slipper clutch?

[Ashlandchris]

Have recently bought a 2nd hand BMax2 which I have tried for the first time today. Drives lovely, but squeals a little when going from a standing start. I presume that is the slipper clutch and it just needs tightening a little or should it be stripped and the plates sanded?

I am pretty new to this and haven't had to deal with a slipper before

Many thanks for your anticipated replies