This may seem REALLY stupid but I have to ask.
In a car, you always use the clutch (its possible to change gears without it, but you will mess up your car nice).
Now, on a bike, do you HAVE to use the clutch to change Geers? I know u do from neutral to first or starting in first, but other than that, geering up or down, is a clutch necesary to use?
again, it may seem like a dumb question but better safe than sorry.