Very interesting; thank you! My bike runs a bit like his does when he flips the choke -- on the leanest setting with a stock jet. Thats just how it runs up in Burque until I get that #65 jet. I never thought to pull the choke while going down long hills (which I do frequently), but I guess my bike runs like it already is; the actual choke just kills it, so I don't use it.