Honda has extended its range of rammer engines with the introduction of the new GXR120 model, suitable to power rammers from 50 to 80 kg (110 to 176 lb). The displacement of the new engine increases up to 121 cm3, boosting power to 2.6 kW (3.5 hp) while nearly maintaining the same engine weight as the GX100 model. The GXR120 is designed with an OHC (overhead camshaft) configuration, the same as the GX100. A newly designed muffler makes the GXR120 even more compact than the GX100, reducing the width by 22 mm (0.87 in). The muffler and OHC layout help to reduce the noise level by 1 dB. Honda developed the GXR120 engine to be interchangeable on the same frame with any GX100 engines. The GX range, including the new GXR120, conforms to Euro 2 regulations as well as the new U.S. CARB/EPA standards, which cover both exhaust and evaporative emissions.