I am possibly purchasing a 07 R6 next week (5,100 street miles on it)that I will turn into a track day, and future race bike. I was wondering if there is a best year or even better year R6 than the 07 for a pure race bike. I read that in 2008 engine compression was increased to 13:1 and a chip controlled intake was added. Is there a noticable difference between the years or even newer years? Would it be wise to build the build the 07 or should I look for something newer? I just don't want to waste any time or money. Thanks!