For all plastics on Car or Motorcycle made in Germany, the type of plastic it is made of, is identified in abbreviated text on the inside of each part. In the case of all K1200 and also Boxers of the same era (1996-2005), the inside fairing parts identification says "PBT + PC". Always look for the letters between > < (see attached photo).
It is not ABS. Plain ABS has poor low temperature characteristics.... it is too brittle when cold.
if you want to get a bit more technical with details to research the perfect fix, a quote about this from one expert on another "K series" forum:
"PBT + PC alloy is a mixture of Polybutylene Terephthalate and Polycarbonate resins. "
"This stuff has excellent low temperature strength. It has nothing to do with ABS (Acrylonitrile-Butadiene-Styrene). It also cannot be glued using ABS glue, or heat-formed in the same way ABS can."
"Xenoy is a trademark for GE's line of PBT-ABS resins. Makroblend is Bayer's trademark for their SIMILAR family of PBT-PC and PET-PC resins. (PET is Polyethylene Terephthalate). PBT and PET have similar characteristics."
Attachment 71861