Howin L4 Engine 17.2cc Inline 4-Cylinder, 4-Stroke, Water-Cooled 。2-Cylinder 4-Stroke Engine Desktop Model – FS-L200AC1-OTThank you for viewing!This is a DIY twin-cylinder engine model designed for learning and display.Made with high-precision aluminum parts, it’s easy to assemble and great for understanding engine mechanics.The model is functional when fully assembled.(I haven’t completed it myself, so I can’t confirm its operation.)Search “FS-L200AC1-OT” on YouTube for assembly and demo videos.•Head cover color is random.•Specs or appearance may differ slightly from photos.No special tools are needed, making it a great gift for car or motorcycle enthusiasts.Due to the weak yen and rising import costs, it may be hard to offer at this price for long.Limited stock available—don’t miss out!Specs:•Model: FS-L200AC1-OT•Engine: 2-cylinder, 4-stroke•Displacement: ~7cc (3.5cc × 2)•Bore × Stroke: 16.6mm × 17.0mm•RPM: 4000–16000•Weight: ~777g•Size: 11.3 × 10.1 × 9.2 cm