Due to surgery in April and again in July, I haven't been riding in a few months. Thought today was time to see if the battery tender did its job and ride up and down the street a little. Opened the door to my storage building and thought "Hmm that oversize plastic gas tank was full the last time I saw it". Yep, you know where the gas went. Drained at the frame and bottom of engine, pulled out oil filter, and ordered a Raptor petcock. My question is, What does it take at this point to be safe? It has not been started with gas in the oil. Do I need to take the engine covers off to drain and clean? Or can I just put some oil in it, run it a little and change again? Next question. I usually take my used oil to Walmart for recycle. Any suggestions on what to do with this mess?