You're on the right track with your understanding of how the body uses carbs and fat for energy. However, when it comes to track cycling, it's important to note that carbs are still a crucial part of an athlete's diet.
While it's true that excess carbs can be stored as fat, they are also the body's preferred source of fuel for high-intensity activities like track cycling. In fact, consuming adequate carbs before a race can help ensure that you have enough energy to perform at your best.
That being said, it's still important to pay attention to the quality and quantity of carbs you're consuming. Opt for complex carbs like whole grains, fruits, and vegetables, which provide sustained energy and important nutrients. And be mindful of portion sizes to avoid overeating.
Ultimately, a balanced diet that includes adequate carbs, protein, and healthy fats is key to supporting your track cycling goals.