Just brought a short posi drive screwdriver and nah like I said the heads of the screws face into the v got my hand in and managed to loosen left rear off but no chance on the others so I can only assume I need to drop the motor and don't really want to do that but hey did put a kx 500 motor into a zxr250 a frame because no one could get me needle and seats for the carbies and it was a stupid idea went awesome but seriously dangerous

you need a long posi mate - the right hand clamps are accessed from the left hand side...

Strictly speaking it's not a posi drive. It's a JIS 2 180 or 200mm length. The clamps are easy to break & even easier to strip the heads.