If you're able to get another motor PLEASE READ the manual!
Dude, trying to blame another member for your mistake is not cool.
The reason you had trouble starting it was because you FILLED the crankcase with oil making it hard to turn the engine over.
1 you stated you overfilled the engine with oil.
2 you stated you ran the engine with no oil.
The problems with your engine are entirely your fault. If you don't know what you're doing DO NOT put another engine on a bike until you do.
I only hope you didn't get the engine from on of the vendors that advertise here.