No, Harry Main isn't riding already but he's itching to get back on the bike. He just needs to be patient before he hops on the bike again after he terribly broke his leg in July of this year.
The following clip shows Harry riding with Jermiah Smith over at Woodward camp earlier in the year. Harry has some new tricks in his mind, maybe we'll see those when he gets back on the Mirraco. For now the movie: