Q2008 can am renegade 800
 

I took my 08 Can Am Renegade 800 out for a ride and somehow the oil plug fell out and bike drained of oil on ride. When bike came to skid stop, rear wheels locked up and oil still coming out on ground from plug hole in a puddle. Oil filter is clean, no metal shavings anywhere visible. took spark plug out, put some oil down cylinder. Replaced with new oil plug and filled with oil and tried to turn it over and it wants to go, but not quick enough. Could this be from lack of juice in the battery, or could it be partially seized? Any assistant would be appreciated before i do a tear down. Thanks,