The FasTrak ® SDX offers commercial-grade power and performance at an unbeatable value. With the strength of up to 60” welded steel decks and a wide front end, the SDX can take on any job/5(12). Buy Hustler FasTrak Ride On Mower SDX 54" Cut with Kawasaki FXV 22hp Engine online today from All Mower Spares! Largest range of products on offer in Australia. Original Model: Various Brands and models including Honda GXVK1, GXVK0, GXVK1, GXVK0, GXV We developed the Briggs kit below from a unit that had the GXVK1 engine on it.