Sold the X1W last night. College kid. Loved it. Never had a sport bike before. Calls me today saying the oil filter loosened up and locked the eng. I said how did that happen? He says it loosened going to school and somehow I was at fault. I say man, I rode an hour to meet you and rode fine when you tested it. And it ran fine when you left. No oil issues. Period. Im thinking he did something stupid but who knows. Hate it for him. I wish I had sold it to someone who appreciated the history of that bike. Harley tech told me that those motors can be run out of oil for a while and wont lock up. Too much compression. Plus the smoke cloud off the header would be a dead giveaway you had problems. Oh well.....