I currently have a 2004 WR 450 with a Athena 480 kit, HotCam's, FMF SS Megabomb, JD Jetting, and all free mods (Grey Wire, airbox cut outs's, etc.). Suspension was re-sprung for my weight, but other then that and fresh oil and nitrogen, is stock All the work was just done this spring, and there is 40 hours now on the top end. I have just stumbled across a chance to move my WR and pick up a 2006 Berg FE550e for no difference in $$. I loose my WR, and I get the 06 FE550 in it's place. The main reason I'm considering this is that the Berg is street legal, and plated, my WR is not. - How do the 06 FE550's compare to my modded WR? - How is the reliability? - How long between needing to check valves? - How long can you expect to go between needing top end rebuilds, like piston rings, cylinders, etc? Any info on these bikes would be MUCH appreciated!