K-Grinds are one of the hardest grinds. Before you even try to do them learn how to do a nose manual. After that just do everything like the 5-0, but land on the front truck so that the nose isn't touhing the curb. When you're done sliding pivot off.
Hints: If your having problems landing the front truck on the curb, try stalling. Just stand next to the curb, pop an ollie, land the front truck on the curb, and pivot off. Do that a few times and you'll be able to do the real grind perfectly.

Trick contributed by: www.skateboarduk.com