4 Stroke Flat Head Engine v2.0

A flathead engine, also known as a sidevalve engine is an internal combustion engine with its valves contained within the engine block, instead of in the cylinder head, as in an overhead valve engine. A matching 2 speed gearbox you can find here: Constant Mesh Two Speed Gearbox by Bootjevaarder - MakerWorld Printing and AssemblyThe parts should be printed on a smooth build plate, not textured.If possible, avoid elephant foot.I printed the model with PLA+ filament, layer height 0.15 mm. Use Hard Plastic Glue where necessary.For assembled and exploded views, use .stl files “3D…… ” (do not print).Printing and assembly in alphabetical order (A1 → H1). Printing tips are available for many parts.Dimensions: 103 x 76 x 134 mm.Weight: 0.14 kg.Metal partsTwo coil springs are needed for the valves, 10 mm width x 15 mm height. Wire thickness 0.6 or 0.7 mm (AliExpress).