Don't know if all responders realize we're discussing a KLR250, NOT a KLR650 (this is the 250 forum, right?).
Service Manual recommends pilot screw out 2 turns on all US models.
The pilot (aka fuel, mixture) screw only dominates air/fuel mixture from idle to perhaps 1/4 thottle; won't make a bike run "hot" at other rpm.
Also, plug readings are only valid at the moment of shut-down, I'd imagine, as in--"throttle-chop" plug readings occur only after the engine is run for awhile at WOT (wide-open throttle) then killed with the kill switch as the bike coasts to a stop . . .
One last comment: Don't know if plug reading are valid anymore, given the wild and wacky blends of fuel (e.g., ethanol-laced) a benevolent and protective "green" government enables (i.e., There wouldn't be ONE DROP of ethanol fuel, without lavish government subsidies to the ethanol industry in the name of "GREEN."). So, pay $ 4/gallon, knowing two caribou at the North Pole don't have to walk around a drilling rig . . .
Last edited by Damocles; 05-08-2011 at 02:01 PM.