Hey guys. I'm slowly moving in to the world of roadracing, and I've just finished my second full season of trackdays on an SV. I'm currently working on buying a 2008 GSX-R600, and I wanted to get some information on their valves from the folks who use them the hardest. I'm intending on using this GSXR both on the street and on the track. It will probably see 6 or 8 trackdays in the (slow) intermediate level this year, in addition to a lot of use on the street. I know that the titanium valves on this thing are regularly replaced by most people who are racing them. When do I need to start worrying about the valves, retainers, etc? I know that 8 days on the track at my level are not the same as running at the front of a WERA grid for a season, but hopefully you all can shed some light on this. Thanks!