iirc you can also adjust the throttle stop screw aswell which is different to the idle bypass screw... this right?

if so do you perchance know the CORRECT clearance for the butterfly? somebody told me once and i completely forgot it was either 0.4mm 40thou, or 4thou (i know it had a 4 in it )

i assume XR3i and XR4i are the same clearance

ps whilst youre there, clean your throttle body with carb cleaner... when i did mine on my old XR3i it was SOOOOO gummed up that cleaning it raised the idle by almost 1000rpm!!!! those things get proper mingin!