IMO the best way to teach pups not to bite is to act as if you are their mom/siblings! When he bites-YELP loud and clear to let him know that he is being too rough if this is'nt enough a short, sharp grab and shake of the scruff usually does it. (This is how his mother would tell him off, you don't want to hurt him just let him know he has misbehaved) I've never had an ongoing bite problem with any puppy using this technique!
Good luck
