Here's what I've done to my '01 426F. I did a modified version of the BK Mod, only adjusted the screw about one turn and the Blue Wire mod. Those helped quite a bit for sure. Then, I just recently bought the 450 cam and had the valves adjusted at the same time. WOW, I wound up with a new bike it seemed once I tried to start it. I've ridden the bike on just two occasions since the work and I'm totally amazed at how different the bike seems. Take my word for it, get the 450 cam and "screw the drill".
I was skeptical like the next guy, but now I'm a believer. For example, my brother came over to spectate while I was doing a shock service. Upon completion I had to show him how easy it was to start the bike now. I was standing beside the bike, on the right side, and started it with one kick with my right leg. You'd never even try this with a stock cam! I'm 6' 1" tall and weigh 153 pounds, not exactly a lot of mass to help out here.
Plus, for trail riding with my 13 year old son who stops all the time, bump starting is unreal. Second gear, barely rolling, just dump the clutch. Voom, you're off.
Do the cam and report back!
Thanks again everyone for all of your help on this subject. The 450 cam sounds better and better all the time. I do have a few questions about it though. Hopefully someone can help me out. First, does the 450 cam cause any premature wear (more than an auto-decomp Hotcam) inside the 426 motor? Is there any need for the other 450 cam? Where is the best place to get the 450 cam & how much $? How difficult is it to install? Anything else I need with the cam? Thanks.