They might bit parts that were left over after the PO put the engine back together,These parts came with my 3C but I’ve no idea what they are, not even sure they belong to the bike, anyone recognise them?
+1 i concur Doctor....jMy guess is they aren't Laverda parts, but the swingarm pivots and bushes for a moto that uses a split swingarm pivot with a mount each side - the centre part is maybe the motor or a central frame section - kinda like a 90s Ducati system?