| 摘要 |
PURPOSE:To improve the cooling effect by providing a cylinder while directing rearward at the rear portion of crank case of power unit for scooter type automatic tri-cycle thereby facilitating collision of wind flowing below the chassis against the cylinder. CONSTITUTION:Single steering front wheel and two driving rear wheels RW are provided, while a power unit 21 is provided between both wheels RW where the rear wheel RW and the upper face of power unit 21 are covered with a cover member 50. The crank case 22 and cylinder 23 of power unit 21 are arranged in front and rear of chassis respectively where the cylinder 23 is arranged while directing rearward of chassis. The upper space of power unit 21 covered with the cover unit 50 is partitioned back and fro by means of a steel partitioner 60 where auxiliary suction units 30 are provided in the front space while an exhaust muffler 40 is provided in the rear space. The auxiliary suction units 30 are provided with an air-cleaner 31 and carburetor 37. |
