Somehow, and engine that i recieved, seemed to be stuck also.
Nothing would turn, I couldn't even pull the clutch lever in.
After bouncing the rear end, the wheel just turned like it was supposed to.
Upon tearing everything apart, i noticed there was Rust everywhere in the bucking bar tube where the ball bearing goes.
Digging deeper showed that everything that was steel inside the engine was seized by rust.
Long story short.
Make sure everything is proper before trying to start and ride.