Complex sentence: In 2007 the bike was made available in a new version, amended to RSA 250, characterized by many different details from previously, including a revised intake system and the new disposition of the gear unit and of thermal groups.
Split into simpler sentences: In 2007 the bike was made available in a new version, which was amended the acronym RSA 250. It is characterized by many different details than the previous model, including the revised intake system and the new disposition of the gear unit and of thermal groups.