I just picked up an 07 WR450 for $3900 It's totally stock and like new. I've been reading and searching the archives. TT rocks Anyway, here are my notes so far. Any comments or advice is appreciated. 1. Air filter cage hole - The hole is "fixed" but I'd rather have the new cage Part # 5TJ-14458-00 Service bulletin # M07-001. 2. Free Mods - grey wire, snorkel, throttle stop, AIS, removal, pea shooter - Which AIS? DIY, GYTR, TT - GYTR AIS # -> GYT-5TJ93-69-01 - Maybe an aftermarket pipe. FMF Q4? 3. Carb - jet it for 8500 ft - creeping & WOT - Rocky Mtns yeah! - jetting YZ needle or GYTR mystery needle or JD kit? - Which YZ needles are people using? 2006 Standard Needle for 07? - What's a NCVQ needle? What's an EMR needle? - Which fuel screw. Old WR has Zip Ty but may not be best option. - accelerator pump (AP) o-ring or wire tie mod - AP screw 1/2 turn mod? - what's ACV? stock jetting is prob pretty good for 8500 ft: mj 162 pj 45 leak 60 start 65 paj 70 maj needle nfnt future jetting tbd: 4. Skid plate - flatlands, scorpion, TT (Utah Sport), etc - leaning towards flatlands http://flatlandracing.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=FR&Product_Code=24-40 - TT pic http://utahsportcycle.com/store/wr450fpic.htm 5. Unabiker Rad Guards FTW! 6. New tires - front D756 - rear D756 or Maxxis IT? 7. New black wheels - front rim is bent a tiny bit - straighten? doubtful. - have silver rims annodized black or buy new? which rims? hubs? 8. TBD - Hand guards - TrailTech from 03 WR or new? - +2 sprocket on rear? - graphics - maybe new gel seat or ? - mount Scott's stab from 03 WR --> SUB mount? bar risers? - AVS controls? or local guy's replicas? RMCP - new tool kit - wrap style?