Patent ID: 7686123

Claim:
A straddle-type vehicle comprising: an engine unit having an engine, a continuously variable transmission (CVT) having a resin-block belt, and a transmission casing defining a belt chamber for accommodating the CVT; and an air passage for guiding air into or venting air out of the belt chamber; wherein the air passage includes a closed casing, in which an inlet port and an exhaust port are formed, and at least one first partition projecting from a first inner wall of the closed casing toward an inside of the closed casing and having at least one second partition projecting in a direction intersecting with the at least one first partition; flow paths are formed on each side of the intersecting partitions, wherein flow directions of the flow paths are opposite from each other; and the flow paths form a curved flow path that runs from the inlet port to the exhaust port in the closed casing.