Considering that the Tiger is about as aerodynamic as a house brick, it is to be expected that you will get some 'interference from crosswinds' When the bike is loaded up it is about 5ft high and a solid wall for the wind to hit!
Coming back up the french peage roads this year i was riding at what felt like about 45 degrees just to keep it in a straight line. But hey, that's the Tiger for you. There's plenty of more 'slippery' bikes out there, but they ain't Tigers are they ?
It is an acceptable fact for an otherwise brilliant bike