Kimura Attack - Blast through a Strong Opponent's Grip
Breaking the defensive grip of a strong opponent when you're trying to finish the kimura can sometimes seem impossible.
Here's a technique that'll make it easy for you. I use it all the time with and without the gi --apply it the same way-- with a lot of success.
To get into the kimura position I've also included a sweep from the 1/2 guard.
Hope it helps you tap out the big guys more often!