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  1. bear09

    Jetting D-Base for YZ/WR 250F

    Model (YZ or WR 250F): 2005 wr250f Timing (WR-YZ): YZ Main jet: 170 Pilot Jet: 45 Fuel screw (turns out): 1 3/4 Needle model/Clip position: 3rd from top Airbox lid (on or off): Lid off Pipe: 450 core through stock shell Altitude where you ride: 0-500ft Temperature where you ride: summer 90 - 100, winter 70 - 80 (Sydney, Aus) Other mods: air box, yz cam, renthal 999's, etc.... Degree of satisfaction: seems to lean off especially when bike gets hot??? Does the leaning off comment seem to make sense???