The Dry Chemical extinguisher found in most campers would be suitable for a
kitchen fire at best.  I would not want to stand around and try to put out
an engine fire with any type of extinguisher.  Much cheaper and effective
to replace your fuel lines.  I don't see why WBX's would be any more
susceptible to fire than any other FI car.  The air-cooled variants, IMHO,
would be, due to their higher operating temperatures.
                                                        Jay  '85 Westy