Ok guys, I have a 2000 426 and yes I have checked and double checked the valves. They are on the low side but within spec. It does have the 450 cam mod and let me tell you a little history. Before the mod it would start (cold) on about the 2 or 3 kicks and (hot) it would start on the first or second always. I did the 450 cam mod, reshimmed the exhaust valves (they are correct) and it was a little harder to start than before. I can kick it over but it is not as easy as some of you have proclaimed. I also swapped the 426 carb for an 03' 450 carb. Now it is really hard to start, about 10 kicks when cold, and hardly never when hot. I usually have to bump start it if I am in the woods so I have to watch out not to stall or turn it off. I am considering going back to the way it was but the 450 carb and cam made a big difference to me. Once the bike is started it runs aweswome but I need to figure out the starting problem. Any suggestions? jets are all stock except for the main, it is 168.