A filler neck 77 connected to a water inlet 69a of a radiator 69 by a flexible water supply pipe 79 is detachably mounted on an attachment 76 which is swingable with a power unit P.

• 通过可挠性给水管路79与散热器69的给水口69a连接的接管嘴77，可装卸地安装在与动力单元P一起摆动的被安装部件76上。