Abstract: A rear fender mounting structure includes features for simplifying the assembly of a rear fender, sub-frame, and grab rails to a rear frame of a motorcycle. The sub-frame has brackets welded onto it. The brackets include holes with protruding collars defining the holes. The rear fender has holes lined with rubber bushings. The protruding collars are fitted into the rubber bushings. The rear fender includes a bracket which is hooked over a crossbar of the motorcycle frame. The fender is then lifted from its rear end, by pivoting the bracket about the crossbar. When alignment occurs between the bracket holes and holes in the rear frame, linkage plates with bolts extending therefrom, are employed. The bolts are passed through the aligned holes. Next, holes in the grab rails can be easily aligned with the ends of the bolts. Nuts are used to secure the arrangement.

Abstract: A first muffler (4) is connected to a rear end portion of the exhaust pipe (2) extending from a single-cylinder engine toward one side of a rear portion of the vehicle body and is provided on one side of the vehicle body. A second muffler (5) is provided on the other side of the vehicle body opposite to the first muffler (4) through a connecting pipe (6). An outer side surface near the front end portion of the first muffler (4) and the second muffler (5) are covered with first and second covers (7) and (8) both plated. Each of the exhaust pipe (2) and the first and second mufflers (4) and (5) have double-pipe structure with outside plated. Further, a front end portion of the second cover (8) is curved toward the center of the vehicle body, and a phantom line as a continuous frontward extension from the front end portion of the second cover (8) is positioned before the axis of the connecting pipe (6).

Abstract: In a gear arrangement consisting of two gears meshed with each other, at least one gear is constructed of a teeth portion having teeth along its circumference and a shaft portion adapted to be mounted to a support shaft, a gap space is retained between the teeth portion and the shaft portion, and an elastic body such as an O-ring, an annular spring, etc. is interposed in the gap space. And a tooth thickness of one gear of the above-mentioned two gears is made larger than that of the other gear. When the above-described two gears are meshed with each other, the teeth portion of the gear having the elastic body interposed therein moves in the radial direction with respect to the shaft portion, and thereby the teeth of the respective gears can be meshed without backlash.