I have been putting in the time converting a KTM RC390 street bike into a road race bike. I think that very people appreciate how much time and energy has to go into converting a modern street bike into a road racer or track day weapon. Modern street bikes have compacted power units/fuel injection/air boxes/wiring that make taking things apart extrememely time consuming. Those who do it for a living (like Ben G) make it look easy and deserve the bucks they charge for doing it. Trust me it is a ton of work. If you want to race and you have the choice of a fully converted race bike VS a stock street bike...you would be nuts to go with the street bike. Look for a bike that has already been converted. My 2 cents. parillaguy
Theres a thread on another forum discussing how much time it takes to convert a bike properly. Roughly 100 hours seems to be the agreed upon time.