I bought an 03 636 over a month ago, I bought it with 5275 miles. now has close to 6000 miles. I ride it every day and want to be sure and keep up on maintance so the bike dosn't break and I die. I've called a few dealerships and been quoted anywhere between 150.00 to almost 600.00 for tune ups. I'm sure the extent of the tune ups are different, so how often should I be doing regular tune ups and what should I expect them to do. Thanks to anyone who responds.