The AI just waits for you to kick and smash your own head into the wall. So frustrating I couldn't stop playing it until I figured out how to beat that bastard.
Play Solid Rider on kongregate, it's the best motocross game I've ever played. It is challenging, fun, very realistic, detailed, and you have unlimited lives and retries.
Nothing better than the first. It's just been chibi-ified, which I personally think is a terrible decision. I do not mean to offend anyway, so don't crucify me for my opinion!