We have a 2000 Yamaha Venture 500 with only 2800 miles on it. It runs great, but burns oil like crazy. It's such a bad smoker that almost no one will ride behind me. A mechanic checked it out and said everything appears to be OK, but admitted he isn't an expert when it comes to this issue. My wife has a 2000 Yamaha Venture XL (fan cooled 485) and hers burns 1/3 of the oil mine does. Any ideas?