This is what happened: For some strange reason I lost the crankcase plug (item 4 in the image found at http://web.mac.com/javier.garza/iweb/WR450) while riding deep inside the woods. At that moment with the engine running there was no oil leaking from the opening so I solved it just by using a coin and duct tape to close it. Of course I didn't returned and kept riding for a couple of more hours. Nothing strange so far. When back at home on the next day I removed the coin and duct tape and started the engine. Surprisingly enough the engine started leaking oil from the opening (item 4 again on my picture) so I turned off the engine immediately. I am by no means any expert but I thought there was no oil in that section of the crankcase so I opened the other plug (item 2 on the image) and it was also oil wet. Checked the oil level and apparently I didn't loose any. My question is: 1. Should there be oil inside those plugs or not? 2. Could I have broken the seal between the oil tray and the generator by not stopping ridding? Help will be much appreciated!