2017 Sea-Doo RXT? -X? 300 RXT-X 300 - RACE-INSPIRED ACCELERATION AND STABILITY FOR THE WIN Built for large bodies of water rougher conditions with the 300-hp Rotax 1630 ACE engine and Ergolock system. Your legs ? lock in? to the machine for added control. Experience performance riding and go from 0-60 mph (0-96.6 km/h) in 3.8 seconds. Watercraft 3 Person DX644965117304884656101369 DX1