It would help if we knew what year we're talking about. They've had Dellorto carbs, Bing carbs and fuel injection. Every one of them could present a different problem.
Also: stock air filter box and cover or do you have pods? Foam pods burn very nicely. I suppose K&N would as well if you got them fuel soaked.
I don't see any reason why an Elefant would be more prone to an intake fire than any other motorcycle.