I had the YZF1000R before my Ninja and think the YZF6R is the same design so you have to pull the front tank mounting bolt, swing the tank up on the rear hinge mount (carefully, you dont want to yank out the fuel level sensor harness) and the petcock is under the tank (real bright idea there Yamaha!) So its kind of a PITA every winter to cut the fuel off and run the carbs dry, if I'd kept mine I would've added another petcock in a more user-friendly location. As far as coolant, these fella's are talking about track-approved coolant which has far less freeze protection but way better heat dissipation - so if you leave water & wetter in your bike below freezing, it could possibly split a radiator tank from the core or worse - for street use, you probably have ethylene glycol & water mix ( standard antifreeze ) so it should be fine through the winter - BUT, if you're not sure then it would be a good idea to drain the system and refill with proper 50/50 mix so you wont have any expensive surprises this spring......other than that, always change your oil & filter before the last ride of the year so its parked with clean lube all winter.......then when spring hits, unhook the battery tender, turn the fuel back on, check your tire pressure, fire it up an ride! Any condensation in the engine oil will boil right off so you wont have to worry about an oil change until later in the year. Some guys like to fog the upper cylinders before storage, but I dose mine with Lucas Fuel Treatment the last couple tanks late in the season.....good stuff, its a stabilizer, cleaner, and top cyl lube all in one! Hope this helps...