Hi, I am thinking about new trackday project and I am looking at 749r as the best object to work with. I have used my 748s for that, but now it is really underpowered to compete all japs. As I have seen here are some forum membres that are using 749r on tracks. Could you tell me what are the disadvantages of those 750cc testatretta engines? Is it true that you have change titanium con rods and valves euch 5000km?