Ok, i know some things about 2 strokers and engines in general but this is what I do for a living...
Don't buy this now unless you have an urge to test the latest and greatest. You would be paying premium and the benefits are not really clear. Wait until a service pack has been delivered and the price is dropped to reaonalble levels.
Consensus; get it when your PC brakes down and you buy a new one - and get it bundeled. Buy some spare parts for your KX5 instead... do a top end rebuild instead..?
Regards,
//John