Okay so I bought this bike put a brand new battery in it and clean the carburetor it turned over a few times and then locked up from compression....I took out the spark plug and the starter and it pulls just normal. I'm trying to find out what it is before I start dumping money into this thing. PLEASE HELP LOL!

 

Some new batteries come flat, check it is fully charged and that your terminals are clean and tight, including earths on engine and frame. Also Yamaha took to calling almost every ATV they made a "Grizzly" a few years back, so the capacity would be helpful.