Abstract: The present invention is directed towards a vehicle for off-road use with an improved frame, rear suspension, fuel tank, air intake, and four-stroke engine. Preferably, the vehicle has four wheels and a rider sits astride thereon. The frame has twin spars and is formed of aluminum. The frame further includes a removable engine frame. In one embodiment, one spar is used as an oil tank and the other spar is a cooling fluid reservoir. A swing arm pivotally connected to the frame and rotatably supports an axle assembly. The swing arm is connected to the frame by a rear shock that is disposed on the central plane of the vehicle. The frame supports a front body panel that includes an engine, air intake that is high and forward on the vehicle. The fuel tank is configured and dimensioned to be disposed beneath a seat, and has a rear portion with a T-shaped cross-section. The engine of the vehicle has and electronically controlled fuel injectors, and has a forward air intake and a rearward exhaust.

Abstract: An instrumentation delivery unit which supports hand-held dental instruments. In one example first and second housing members form a sealed chamber. When the members are separated, access is permitted to the interior of the chamber, e.g., for maintenance purposes. A first portal suitable for connection to a vacuum line provides a partial vacuum in the chamber, and second portals provide connection via second vacuum lines between the chamber and dental devices to operate the devices. The housing includes hand piece holders each of an initial diametric size for receiving hand pieces up to a maximum diametric dimension, with one of the hand piece holders formed along two adjoining ones of the housing members. The adjoining housing members secure inserts between one another to provide a second diametric size smaller than the initial diametric size to thereby selectably accommodate hand pieces having a smaller diametric dimensions.