The EFI WR has only on knob at the throttle housing. Here are my findings so far: One can turn it forward (counter-clockwise when viewed from the side) to raise the idle speed , or back to lower it. When pulling out that knob firmly, it notches and stays pulled, that is described as cold start "choke" position. There is a mechanical stop at "max-idle", my idle setting is 34 clicks below that max.idle setting. At 34 clicks before max. idle I can lightly pull out that knob (w/o it clicking into choke-setting) and idle rises. When hot (and not in gear) slightly pulling the chock-idle knob as described, gives e-start at first button press, always. How can one single knob act as coldstart-choke (more air + lots of more fuel) and a hot-start knob (just more air) at the same time? Does the CDI know about the knobs position? I didn't find a choke-knob position sensor. If not and if that knob does NOT affect the throttle's butterfly position, but simply opens an air bypass path, then raising idle would effectively mean creating a lean mixture! Can anybody describe in detail what the - idle adjustment action (turning the knob) and respectively - choke action (pulling it out) are doing technically?