Momentum is key when trying to jump any bike, more important when jumping a two stroke, and extremely important when jumping a 125. MOMENTUM, MOMENTUM, MOMENTUM. Hope that makes it clear. Keeping speed up through corners and down straights is the key to a 125. Watch and see how fast the pro riders go through corners. More speed in the corners = more speed down the straight to do jumps. To keep the front end down, you need to get over the front of the bike. Again the pro riders almost always sit or stand with thier upper bodies leaned forward, above the bars and gas cap.