| 摘要 |
PROBLEM TO BE SOLVED: To circulate a cooling water between radiators in front and in the rear of the body and an engine through the use of a body frame. SOLUTION: An upper tube split into a front elongation member 12A and a tail member 12B is extended from below a head pipe 10 backward to a pivot part 18a. The bottom of a down tube 11 extended down from the head pipe 10 is welded to the front oversurface of the front elongation member 12A while the front extremity of the member 12A is protruded ahead from the bottom of the down tube 11A. A front joint member 13A is attached to the front extremity of the member 12A, and a rear joint member 13B is installed between the tail of the member 12A and the front extremity of the tail member 12B. A radiator 20 is installed under the head pipe 10 and connected with the front joint member 13A. A water pump 32 and connector 34 of a unit swing engine supported by the pivot part 18a are connected with the rear joint member 13B through a cooling water hose 36. |
