O.S. Engine have introduced a special edition of their popular B2101 3.5cc off-road engine to celebrate the company’s 80th anniversary. The limited Las Vegas Edition sports five stars and stripes on its cylinder head – each one representing an O.S. IFMAR Worlds victory. Otherwise the engines relies on the proven B2101 design with a DLC-coated crankshaft balanced with tungsten weights and a 21J carburettor.