SW-Motech DUSC hard case systemDUSC hard case system The complete system includes all components required for use with the Yamaha Tracer 9 GT GT+ and the DUSC: two DUSC hard shell cases, two removable PRO side carriers, an attachment kit, a lock set with matching keys. The bike specific carriers and size of the cases are designed to perfectly match the shape of the tail as well as the motorcycle's exhaust system. PRO Side carrier Extremely durable due to its optimized shape and 2.