During the Florida competition Trip's goggles vary between being Scott in one shot and Dragon in the next. This occurs throughout the race but is especially obvious on the line-up when Trip puts his goggles on.
When Piper Cole does a back flip in front of Trip, the crossover between when the original actor for Piper (Cameron Richardson) and the stunt double is obvious. Cameron attempts the jump normally, as if to complete the jump without a trick. In reality, to perform a back flip, the rider would need to lean back quite substantially half way up the jump in order to get a full rotation.
When Clay Sparks is telling his mechanic to revalve his son's bike he says to send it to RG3. However, the subtitles on the DVD write this as "Archie Three." RG3 or Research Group Three, is a popular motocross suspension company.