Just got a 98 YZ400F and want to make sure it's up to speed (pun intended). Any suggestions on what the top 5 or 10 "must have" upgrades should be for this bike? (75% trail, 25% track). 450 Exhaust cam is the only one on my list so far. It has quite a bit already, that's why I bought it. Looked over this site the past week since I've gotten it and most of you have things I've never even heard of...Any direction would be greatly appreciated. So far it has: WB eSeries pipe Magura hydraulic clutch Excel/Talon wheel sets BBR Kickstarter Applied Racing triples ProTaper bar and mounts BBR Aluminum subframe Handful of other cosmetics (carbon fiber covers, etc.) Zero done to the engine and carb as far as I can tell.