Hello, my engine hours are getting pretty high on my 08 450. Yesterday at the track i noticed radiator fluid on my left boot, coming from the overflow tube. Not a whole lot, and the radiator is topped off. Is this normal? Also, at 207 hours on the bike I am starting to think that I need to have some work done. The bike fires up first kick when hot and about 4-5 kicks when cold. I am concerned that the timing chain has reached it's limit. I also want to get a new slip on exhaust, (still running the stock one) but I want to make sure that my engine is in top shape before attempting any sort of increase in power. Any recommendations?