I wouldnt call that a bargain deal. There isnt much done to that bike as far as mods go, and the motors is a complete do over. That crank looks wangish to me. If it infact is, thats the reason for the failure. You will have to decide how much you want to spend on the rebuild. Are the cases good? At this point you can buy a stock stroke crank and use stock or aftermarket cylds or build something bigger. IMO Id watch for a used 4mil cub or a set of ported 4mil stock cylds and and start the rebuild. If you have some money to spend Id look to a site sponsor to get you hooked up with a new setup, that way you have their knowledge to help you along the way.