The DR-BIG aka Desert Express DR800S (in German) off-roader was existent for two model years as the DR750S (in German) until 1990, when its displacement increased to 779cc, still the world largest single cylinder engine in a production motorcycle.[16] Available in Europe through 1999, it was not exported to the U.S. market.[17] Replaced by the V-Strom twin, the DR-BIG has now come full circle as the design inspiration for a 2014 overhaul of the V-Strom 1000 ABS.[18] Suzuki RF Series The Suzuki RF series are sport touring motorcycles.