A de-tuned version of the DT100. A very nice 60 degree, 1419cc, V4 (I have one
) with lots of torque. Weighs 153kg. Yam is an inline 3 cyl 1140cc unit, weighing 117 kg and is probably better suited to a SR5.4, due to its lesser weight on a narrow beam RIB. The Soozook would be my choice though, all things being equal (age, cost, condition, etc.)
That one sounds good value if it's in decent condition.