So a few weeks ago I noticed a few drops of oil on the ground and had a look. I cleaned off the build up under the bike to make sure I knew where it was coming from. I have included two pictures. Im pretty sure Im going to have to replace the gasket but I dont know what it is called or where to get it. I have tried looking for a diagram just for the gaskets but cant find one. Could someone point me in the right direction for where to buy this and what the gasket is actually called. Also, Im pretty sure the answer is yes, but will I have to pull the entire engine out to replace it, or is there any other way to fix the leak? Thanks for all the insight so far and I look forward to more of it.