Yesterday I noticed my rear tire was dirty as ****. After checking it out i realized the dirt buildup was due to an oil leak on the underside of the shaft where it bolts into the 'pumpkin'. There was a good amount of oil buildup that i cleaned before taking the photo. A small oil spot was also on the ground from dripping out. When i first bought the bike there was a little build up at the area but not this severe. I have read through a lot of posts about oil leaks in the last 24 hrs but none that describe this problem. (don't think its the guide plug) Besides buying an owners manual today, I plan on talking to some local bike mechanics about the issue. If anyone has an idea about what is causing this leak please put your 2 cents in. Thanks.