Listen man. it sucks whats going on but you cant change the numbers on that frame. lets just say the bike is stolen and they come for it but you dont have it, but you still have a banshee with a different vin. once they figure out you changed that vin your fucked. thats jail time there. you can get a receipt and wait it out. if you change it and its his you are then a suspected of auto theft. trust me. dont do it. its one thing to purchase a stolen bike and another to change it up so it dont look stolen when it is. just ride it out. if its not hot get a dam title.