Our New General Purpose RTV-X900 is equipped with a 21.6 hp Kubota D902 3-cylinder diesel engine, exclusive Variable Hydro Transmission (VHT-X) and standard 4-Wheel Drive.Get to work in rugged, heavy-duty style without sacrificing comfort or versatility. Kubota's RTV-X900 Worksite Orange model features a smooth VHT-X transmission, strong, high-rigidity steel frame, Kubota's Extra Duty IRS (independent rear suspension) and more.