Hello everyone, I am new to this forum and I did a search on the problem I'm having but I still have some questions. I just purchased a used 07 YZ450F, brought it home and changed the oil and filter. Checked the dipstick and no oil on it. Started the bike with no problem, checked for pressure and no oil came out after a minute so I turned te bike off. Checked the dipstick again, no oil. Pull the oil filter plug, no oil. Pulled the cover to the filter, no oil. Put everything back on and tried to start the bike again, but this time I could hardly kick start the bike. What could be happening here because I'm new to all this. Thanks for any help you can provide.