Don't ride it like your XR400 or a DR350 because you won't get anywhere. There's no power off the bottom so you can't knock it through the gears and let the torque do the work. You have to thrash the engine and then it will make sense, hold onto the gear longer. A lot of people just can't get on with them as they think there's no power but you just have to re-train your brain.
My mate sold his 300L in less than 2 months but he's a serial bike changer so that might not say much.