4-stroke, two cyl, DUAL OVERHEAD CAM, 54° V-twin, Fuel injection1783cc V-Twin engine,tuned to produce massive torque from idle to red-line, The M109R B.O.S.S. features an advanced chassis built for effortless cruising across town, or across state lines. Its unrivaled capabilities are born from Suzuki's championship-winning race heritage. The M109R’s engine is tuned to produce massive torque. The big V-twin also produces a throaty, aggressive exhaust.