Not broken in properly could mean a lot of things...rev hits, no recorded service, etc. Basically check the overall condition of the bike and how it runs and rides. If you are still liking it after that, then I would have a competent mechanic check it out really good, possibly do a compression check and any other checks the mechanic suggest. That should help you make up your mind whether or not you're comfortable with purchasing this bike. Just remember, these are high performance machines and they do require care! These are just some of my thoughts.