[problem] the issue of the present invention is to provide it is a kind of have exhaust sensor it is two-wheeled in, inhibit the influence to the layout of other component, and be not easily susceptible to the technology of the influence of slungshot. [solution] exhaust pipe 41 is connect with the exhaust outlet 66 of engine 12 Catalyst 42 in the exhaust pipe 41 is set It is a kind of two-wheeled, it has the exhaust sensor 67 for being set to the exhaust gas constituents in exhaust pipe 41 and being able to detect in exhaust pipe 41, exhaust pipe 41 has the vertical portion 74 extended downward, catalyst 42 is supported in the top of vertical portion 74, and, lower part that exhaust sensor 67 configured in vertical portion 74 and it is configured at the lower section of catalyst 42, is configured at the vehicle rear side of vertical portion 74. [selection figure] Fig. 2
