It has been my experience that by far the best money I have spent that produced the best results was directed at coaching and track time.
I weigh far more than other riders and racers so really I should be far behind but with great coaching and practice; I have been able to hold my own and if it's in the rain; I'm in front!
There is a long list of stuff to throw your money at as noted above but if you really are interested in results: spend your money on continuous coaching, track time and physical fitness.
We have a racer you may know of: Steve Crevier. He can hop on any piece of junk and spank everyone!
It's not the machine. Certainly not at the level of most of us mortals! However; make sure your bike is red because it's the fastest!
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The Smart Money: #1 - ATGATT, #2 - Training (machine skills and survival skills), #3 - The bike; whatever floats yer boat with the money you have left over
