1. Cylinder diameter specifications: Φ50mm (standard version) and Φ53mm (expanded cylinder version) are two options, support four-stroke air-cooled engines, effective height of about 64-85mm, suitable for original crankshafts and connecting rods
2. Material: Adopt ADC12 aluminum-silicon alloy casting, with a silicon content of 11-13% and a density of 2.7g/cm³, is 40% lighter than cast iron. Its thermal conductivity is 150 W/m·K, which can quickly remove heat from the combustion chamber.
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