Complex sentence: Throughout the 80's and 90's sales of the four main manufacturers (Ski-Doo, Yamaha, Polaris, Arctic-Cat) continued, with most reaching their all time sales high in the mid 90's.
Split into simpler sentences: Throughout the 80's and 90's sales of the four main manufacturers (Ski-Doo, Yamaha, Polaris, Arctic-Cat) continued. With most reaching their all time sales highs in the mid 90's.