Good job on the website, I bet you'll find that you will alter, and alter again and again haha, I change my website so often :S
Only thing I'd change though, is on your home page about you section, avoid saying that you've been riding since you were 4, and then say for 12 years. Perspective clients don't need to know that you're only 16 ;)
Also, are the photo's on the site all yours? If they're copyright images, you can get into big strife having them up on your website as it is false adverting and could even be claimed as fraud.
Otherwise, excellent job!