Is it true that when shifting the YZ450 or any other MX bike, the clutch is not really needed? If it is needed, is it for downshifting or upshifting? When I want to change gears from 2nd to 3rd, do I have to back-off the throttle to upshift if the clutch is not used? How about from 3rd to 2nd? I do know that shifting to first, the clutch is needed.