I just got a 2008 tw200 and thought that I should do an oil change. I'm not sure what type of oil was in it when I bought it, but I put in 10w-40. Now there is a tapping sound when the bike is idling. I just want to make sure that I didn't do something wrong with the oil change. The oil level looks good and when I unscrewed the bolt referenced in the "How to change your own oil" post, oil did leak out. Should oil just kinda leak out slowly or should I see a good flow? Does this sound ok, or do I have a big problem. Thanks