This convenient system allows the angle of the jet pump nozzle to be controlled electrically (step-free adjustment range is +/- 8° from STD), making it easier for riders to adjust the attitude of the hull to suit water surface conditions and riding style. In rough water, angling the jet pump upwards raises the bow for rough water handling. Conversely, when conditions are smooth, angling the jet pump downwards lowers the bow for turning performance.

Fitted with a supercharger and intercooler, the liquid-cooled 1,498 cm3, In-line 4-cylinder marine engine that propels the ULTRA 310 Series models forward with an exhilarating rush of acceleration produces an output much greater than a normally aspirated engine of the same displacement. This is due in large part to the use of a roots type TVS supercharger, which generates boost even at low rpm to ensure powerful acceleration, right from idle. A number of changes to increase engine efficiency – by reducing mechanical loss, and through other improvements – elevate engine output to 221 kW (300 PS).

The ULTRA 310R is equipped with a new sport seat designed specifically for hard sport riding. The moderate contour of the seat supports the rider’s hips, offering enhanced lower body support for hard sport riding.

The all-digital instrumentation makes use of a single, highly legible LCD display. A revised design adds a higher quality image and increases visibility of some of the features.

Like that of its predecessor, the deep-V hull design enables a high bank angle, motorcycle-like turning performance. This reduces the lateral G-loads imposed on riders during turns, allowing them to better concentrate on riding. Measuring 22.5°, the idealised V-angle at the bottom of the hull helps prevent spinouts during sharp turns. As a result, the ULTRA 310 Series models deliver the neutral handling and turning characteristics for which Kawasaki JET SKI watercraft are famous.

The post-style handlebar is similar to the kind found on Kawasaki’s KX450F flagship motocrosser, although this ’bar offers even greater adjustability. * Handle position is adjustable, both for height and forwardearward position. A total of 12 positions are available; 18 if the optional handlebar holders are included.

The KSS (Kawasaki Smart Steering) supplementary steering system is designed to assist new riders as they learn turning and manoeuvring of a personal watercraft. Experienced users may not even notice the system at all. Smart Learning Operation (SLO)-Mode function allows newer riders to become familiar with the handling and response of this JET SKI watercraft at a more relaxed pace before unleashing the full power of the supercharged engine. Two separate keys (one for SLO-mode, one for full-power operation) make it easy for operators to know which operating mode they are using.

Electronic throttle valves efficiently manage the engine’s massive power output. They also make minute engine control possible, enabling easy switching between riding modes.

This handy mode is used in “No Wake” zones. It regulates engine speed to maintain a forward speed of 5 mph (8 km/h).