well basically get on back wheel get near the edge from where you are gapping from lower the front end whilst preloading then give a masisve kick and as soon as you have done that bend your knees right up so you are tucking so you get greater clearence and then when you want to land extend your legs so the bike goes down to the floor and make sure you tuck on landing so you get a softer landing. kee practicing that and then you will concer your gaps, some people find it easy soem people find it hard so dont worry. hope this helps