i change my oil every 3,000 miles, always use a new filter myself, usually the book will say to replace it every other change so thats up to you... people say to clean/lube your chain every 500 miles but i just don't have the time, i do it about twice an oil change so every 1,500 i give it a good cleaning and spray on new chain lube, but just as important is making sure it stays in adjustment... if its an 04 thats about it i'd say, i'm just going by suzuki recommendations but for the most part a bike is a bike, check the air filter around 10k, spark plugs at 7,500, change the coolant and brake fluid every 2 years... as far as winterization i wouldn't do anything, our winters are so short and mild, add to that the occasional 60 degree day where you can pull it out and ride and then yours being insulated you should be fine