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Reactivity-Controlled Compression Ignition (RCCI) is a promising low-temperature combustion (LTC) strategy to mitigate the oxides of nitrogen (NOx) and soot emissions. However, the unburned hydrocarbon (HC) and carbon monoxide (CO) emissions are much higher in RCCI compared to the conventional diesel combustion (CDC). In this present work, multiple injections of the direct-injected (DI) diesel fuel are explored as a potential method to reduce the high HC and CO emissions. Although significant research works have been done in the past on RCCI combustion in different engine types, investigations on small air-cooled diesel engines are very limited. In the present work, a production light-duty air-cooled diesel engine is modified to run in RCCI, with diesel as the high-reactivity fuel and gasoline as the low-reactivity fuel. Before modifications, the engine is run in CDC with production settings. In RCCI, experiments are initially performed with single-pulse DI.