Anyone had experience riding a carb'd sports bike from sea level to high altitude like the Alps? I was contemplating a bike which is carby fed but, someone's just told me I will need to change jetting / carb settings when I get to high altitude or the bike will run like crap, have no power, stall, foul plugs, be a pig, etc. Is this true? The bike in question I'm thinking of taking is a 2000 R1. The last thing I want to be doing is buggerising around cluelessly with not just 1 or 2, but *4* carbs, and then finding out it runs like crap when I get back to London.