Saddle-type vehicle with exhaust pipe catalyst arrangement

A straddle-type vehicle comprising:

• a vehicle body frame including an engine mounting frame;
• an internal combustion engine mounted on the engine mounting frame and having an intake port and an exhaust port;
• a swing arm extending rearward from the engine mounting frame and having a front end portion pivotally supported by a pivot shaft at a rear portion of the engine mounting frame;
• a rear wheel connected to a rear end portion of the swing arm;
• and
• at least one exhaust assembly including an exhaust pipe connected to the exhaust port of the internal combustion engine, a muffler connected to the exhaust pipe, and at least one catalyst housed in an intermediate portion of the exhaust pipe on an upstream side of the muffler, the at least one catalyst including a first catalyst and a second catalyst, wherein
• the pivot shaft is disposed higher than a lower portion of the engine mounting frame,
• the first catalyst and the second catalyst are disposed in front of the rear wheel, behind the internal combustion engine, and below the swing arm,
• the at least one exhaust assembly includes a first exhaust assembly and a second exhaust assembly disposed each on a left side and a right side of the vehicle,
• the intermediate portion of the exhaust pipe of the first exhaust assembly contains the first catalyst inside of a portion of the intermediate portion extending along a left-right direction of the vehicle such that an inlet and an outlet of the first catalyst face in the left-right direction,
• the intermediate portion of the exhaust pipe of the second exhaust assembly contains the second catalyst inside of a portion of the intermediate portion extending along the left-right direction of the vehicle such that an inlet and an outlet of the second catalyst face in the left-right direction, and
• the intermediate portion of the exhaust pipe of the first exhaust assembly and the intermediate portion of the exhaust pipe of the second exhaust assembly face or are brought into contact with each other at a position of a center line extending a front-rear direction of the vehicle.

A straddle-type vehicle comprising:

• a vehicle body frame including an engine mounting frame;
• an internal combustion engine mounted on the engine mounting frame and having an intake port and an exhaust port;
• a swing arm extending rearward from the engine mounting frame and having a front end portion pivotally supported by a pivot shaft at a rear portion of the engine mounting frame;
• a rear wheel connected to a rear end portion of the swing arm;
• and
• at least one exhaust assembly including an exhaust pipe connected to the exhaust port of the internal combustion engine, a muffler connected to the exhaust pipe, and at least one catalyst housed in an intermediate portion of the exhaust pipe on an upstream side of the muffler, the at least one catalyst including a first catalyst and a second catalyst, wherein
• the pivot shaft is disposed higher than a lower portion of the engine mounting frame,
• the first catalyst and the second catalyst are disposed in front of the rear wheel, behind the internal combustion engine, and below the swing arm,
• the at least one exhaust assembly includes a first exhaust assembly and a second exhaust assembly,
• in the exhaust pipe of the first exhaust assembly, an upstream portion is disposed on a left side of the vehicle, a downstream portion is disposed on a right side of the vehicle, and the intermediate portion extends in a left-right direction of the vehicle,
• in the exhaust pipe of the second exhaust assembly, the upstream portion is disposed on the right side of the vehicle, the downstream portion is disposed on the left side of the vehicle, and the intermediate portion extends in the left-right direction of the vehicle,
• the exhaust pipe of the first exhaust assembly contains the first catalyst inside, and the exhaust pipe of the second exhaust assembly contains the second catalyst inside, and
• a portion of the exhaust pipe of the first exhaust assembly which is located on an upstream side of the first catalyst and a portion of the exhaust pipe of the second exhaust assembly which is located on a downstream side of the second catalyst are disposed aligned with each other at a position in a front-rear direction of the vehicle.