Complex sentence: The two seat versions of the aircraft are usually fitted with the 100hp Rotax 912S however they have also been fitted with the 80hp Rotax 912 and 115hp turbo charged Rotax 914.
Split into simpler sentences: The two seat versions of the aircraft are usually fitted with the 100hp Rotax 912S. However they have also been fitted with the 80hp Rotax 912 and 115hp turbo charged Rotax 914.