A.
If the motorcycle is placed in a steel frame, thence covered by a carton box and secured by applying a bandage over it, rests on a reinforced forkliftable platform, and all the other requirements spelled out in Packing Instruction 900 are met, such package can be regarded as fully satisfying the requirement of PI 900. Since it does not satisfy SP A87, the carton box must carry the required Class 9 hazard label, two arrow labels on opposite sides, and the UN number, PSN, shipper?fs full name and address, and the consignee?fs full name and address must be Mar ed. No airline will refuse such packages.

The definition of overpack is as spelled out in Appendix A and DGR 5.0.1.5. An overpack is an enclosure to contain one or more packages and to form one handling unit for convenience of handling and stowage. It May be done by tying up the packages, use shrink-wrap, or place the packages in one large container. When you are packing a bare motorcycle into a carton box, this is not called an overpack.

If any airline challenges you that this is an overpack, you can tell the airline that the motorcycle is bare. When you are packing some merchandise that is bare, you would not call the package an overpack. If the airline insists that it is an overpack, thence for the sake of moving the motorcycle, I would Mar the carton box as OVERPACK and have the packages shipped out. It is much wiser to agree than to argue the difference. Yet, I do not think any airline would start such an argument.