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A cowling structure for a saddle-ride type vehicle for cooling an engine and providing a windshield for a rider. The cowling structure includes a seat for a rider to sit thereon, the seat is arranged behind and above an engine suspended from a vehicle body frame. An under cowl covers at least part o

A cowling structure for a saddle-ride type vehicle for cooling an engine and providing a windshield for a rider. The cowling structure includes a seat for a rider to sit thereon, the seat is arranged behind and above an engine suspended from a vehicle body frame. An under cowl covers at least part of a lower portion of the engine. The under cowl is formed to cover at least part of a side surface of the engine. A guide portion is provided in an upper portion of the under cowl, the guide portion extending inward in a vehicle width direction and toward the side surface of the engine. An opening is provided in front of the guide portion, the opening introducing a flow of air into the under cowl. The guide portion has a slope surface which slopes downward from the front to the rear of the vehicle.

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1. A cowling structure for a vehicle including: a vehicle body frame;an engine suspended from the vehicle body frame;a seat for a rider to sit thereon, the seat arranged behind and above the engine; andan under cowl for covering at least part of a lower portion of the engine wherein the under cowl c

1. A cowling structure for a vehicle including: a vehicle body frame;an engine suspended from the vehicle body frame;a seat for a rider to sit thereon, the seat arranged behind and above the engine; andan under cowl for covering at least part of a lower portion of the engine wherein the under cowl covers at least part of a side surface of the engine;a guide portion provided in an upper portion of the under cowl, the guide portion extending inward in a vehicle width direction and toward the side surface of the engine, andan opening provided in front of the guide portion, the opening introducing a flow of air into the under cowl,wherein the guide portion has a slope surface sloping downwardly and rearwardly from a position forward of a clutch cover to a position rearward of a pivot shaft of the motorcycle. 2. The cowling structure for a vehicle according to claim 1, wherein the under cowl is formed in a V shape with a vertex at a lower end thereof in a front view, and is also formed in such a shape that, in a plan view, its width is larger toward the rear. 3. The cowling structure for a vehicle according to claim 2, wherein a flow of air introduction portion is provided between the under cowl and a front portion of the engine, and a flow of air release portion is provided between the under cowl and a lower portion of the engine. 4. The cowling structure for a vehicle according to claim 1, wherein a flow of air introduction portion is provided between the under cowl and a front portion of the engine, and a flow of air release portion is provided between the under cowl and a lower portion of the engine. 5. The cowling structure for a vehicle according to claim 1, wherein a muffler is arranged at a rear side of the slope surface of the guide portion, and an exhaust pipe connected to the muffler is arranged along the under cowl. 6. The cowling structure for a vehicle according to claim 1, wherein a muffler is arranged at a rear side of the slope surface of the guide portion, and an exhaust pipe is arranged along the under cowl, and the exhaust pipe is connected to the muffler at a position adjacent to a rear most portion of the guide portion. 7. The cowling structure for a vehicle according to claim 1, wherein the under cowl has a rear portion thereof fixed to the vehicle body frame and has a front portion thereof fixed to a cover member hung on a side surface of the vehicle. 8. The cowling structure for a vehicle according to claim 1, wherein the under cowl has a rear portion thereof fixed to the vehicle body frame and has an attachment portion provided on a front portion thereof fixed to a lower portion of a cover member hung on a side surface of the vehicle. 9. The cowling structure for a vehicle according to claim 8, wherein the attachment portion provided on the front portion of the under cowl is arranged forward of a water pump on a side portion of the engine. 10. The cowling structure for a vehicle according to claim 8, wherein reinforcing ribs are provided on the front portion of the under cowl adjacent to the attachment portion. 11. A cowling structure for a motorcycle including: a body frame;an under cowl for covering at least part of a lower portion and a side surface of an engine;a guide portion provided in an upper portion of the under cowl, the guide portion extending inward in a motorcycle width direction and toward the side surface of the engine; andan opening provided in front of the guide portion, the opening introducing a flow of air into the under cowl,wherein the guide portion has a slope surface which slopes downwardly and rearwardly from a position forward of a clutch cover to a position rearward of a pivot shaft of the motorcycle. 12. The cowling structure for a vehicle according to claim 11, wherein a muffler is arranged at a rear side of the slope surface of the guide portion, and an exhaust pipe is arranged along the under cowl, and the exhaust pipe is connected to the muffler at a position adjacent to a rear most portion of the guide portion. 13. The cowling structure for a motorcycle according to claim 11, wherein the under cowl is formed in a V shape with a vertex at a lower end thereof in a front view, and is also formed in such a shape that, in a plan view, its width is larger toward the rear. 14. The cowling structure for a motorcycle according to claim 1, further comprising: a relief portion is provided in the upper portion of the under cowl to keep a water pump on a side portion of the engine away from the under cowl. 15. The cowling structure for a motorcycle according to claim 11, further comprising: a relief portion is provided in the upper portion of the under cowl to keep a water pump on a side portion of the engine away from the under cowl.