As long as you do it when your off the throttle, it should be fine. There's not a big different with using or not using the clutch to shift into neutral as long as your not on the throttle. THe smoothest way ot do it would be ot apply light pressure as you lift off the throttle. IT should slide out of gear easiest at the moment when their is "slack" in the tranny. Meaning that you are niether accelerating or under compression braking. FOr that brief moment, thereis no load on the transmission gear and the gear dogs can disengage easily.