knee down is all about body position,watching the chicken strips on the rear tyre and fun,the correct tecnique should give you more ground clearance as the bike doesnt lean any further than the edge of your rear tyre giving max edge grip,correct body position means your body mass is helping to turn the bike more agressivley at a faster pace,once mastered i found i was shifting my weight in most fast corners even if not aiming for a knee down,it just settles the bike and keeps the riders weight low and to the inside of bike and the turn,knee down is great it teaches you about grip ,throttle control,riding lines etc,BUT be warned i high-sided my fz learning to left knee down,was throwing down hard and gassing way to hard,saved it though,and it taught me how hamfisted i could be before it let go,
ALWAYS WARM YOU TYRES
ALWAYS CHECK THE ROAD SURFACE FIRST
BE SMOOOOOOOOOOOTH
GRADUALLY BUILD UP TO IT
HAVE FUN