CDHPOWER 2 Stroke YD100 Engine Silver Color Engine. CDHPOWER 2 Stroke YD100 Gas Engine ONLY, NO manual, YD100-50mm 79CC/80CC Engine;. 2 Stroke YD100 Gas Engine ONLY, NO manual,YD100-50mm 79CC/80CC Engine; Bore and Stroke: 50mm x 40mm; no sticker on motor; Better adjusting clutch a little before riding.
