The 2K-2 stators are the same for KTM and GG. The backing plates are almost the same as well, a slight mod and a KTM stator and backing plate can be used, otherwise the actual stator coils and pickup can be swapped to the GG backing plate. I am not sure about the flywheels but I would bet they are the same, with the same taper and timing. GG is a small customer of Kokusan and there would be no reason to spec a special part. If you have a friend with a KTM, compare your trashed flywheel for fit and timing. If it fits, find a KTM 2K-2 from a part out. I do not think you will be able to find just a flywheel, even new.