Biking Techniques (Part 5)

No coasting

On the track you're braking, cornering, or on the gas. Period. There's no neutral throttle, no coasting along at a constant speed while you decide where to brake, you're always working the bike in one way or another. So no backing off halfway down the straight -- if it feels too fast, look up and further ahead.
Of course there are exceptions to being fully on the gas. Sometimes you'll need to ease off from full throttle to stay behind another rider if you can't pass before the next corner, or if you're riding in another bike's draft. But anytime on the straight you are not riding close behind another bike, you should be fully on the gas.

From TrackDoD Novice Group Orientation