its actually really easy once you find out how to do it. i'm not 100% sure if its the same for your year of yamaha but usually if you lay down on your back and feel alon the inside of the tunnel on the chaincase side towards the front of the sled you'll feel a bolt thats usually square and this will be your drain plug. twist it off, let it drain out, and then fill it back up. your dealer should sell the lube in little bottles and one bottle is usually more than enough. also, before you fill it up, take the dipstick (thats on the chaincase under the hood) and remove it and clean off the magnet. snug up the bolt, fill it up, and your ready to go! hope this helps!