A straddled vehicle comprising: a crankcase including a wall with a hole therein; a cylinder connected to the crankcase, at least a part of the cylinder being located above the crankcase; a crankshaft placed inside the crankcase and including a first crank web including a first side wall and a second side wall on an opposite side from the first side wall, a second crank web facing the second side wall of the first crank web, a crankpin connected to the first crank web and the second crank web, and a first shaft provided on the first side wall of the first crank web; a transmission placed inside the crankcase and including a first rotation shaft, a second rotation shaft, a plurality of first gears provided on the first rotation shaft, and a plurality of second gears provided on the second rotation shaft and meshing with the first gears; a connecting rod including a big end and a small end, the big end including a pin hole in which the crankpin is inserted; a piston placed inside the cylinder and connected to the small end of the connecting rod; a bearing placed in the hole of the wall of the crankcase and configured to rotatably support the first shaft; an annular plate fixed to the first side wall of the first crank web, a part of the annular plate being spaced apart from the first side wall, a centrifugal filter formed by the first side wall and the annular plate, the centrifugal filter being closed on a radially outer side and being open on a radially inner side; a first oil path communicating with the centrifugal filter and configured to guide lubricant to the centrifugal filter; and a second oil path configured to connect between the centrifugal filter and a gap between the connecting rod and the crankpin, wherein: the second oil path includes a first channel hole formed inside the crankpin and extending in an axial direction of the crankpin, and a second channel hole formed inside the crankpin and extending in a radial direction of the crankpin, the second channel hole communicating with the first channel hole; a front end of the transmission is located rearward of a rear end of the cylinder; the transmission is placed rearward of the centrifugal filter; and a part of the transmission overlaps with the centrifugal filter, as the vehicle is seen from the front. a crankcase including a wall with a hole therein; a cylinder connected to the crankcase, at least a part of the cylinder being located above the crankcase; a crankshaft placed inside the crankcase and including a first crank web including a first side wall and a second side wall on an opposite side from the first side wall, a second crank web facing the second side wall of the first crank web, a crankpin connected to the first crank web and the second crank web, and a first shaft provided on the first side wall of the first crank web; a transmission placed inside the crankcase and including a first rotation shaft, a second rotation shaft, a plurality of first gears provided on the first rotation shaft, and a plurality of second gears provided on the second rotation shaft and meshing with the first gears; a connecting rod including a big end and a small end, the big end including a pin hole in which the crankpin is inserted; a piston placed inside the cylinder and connected to the small end of the connecting rod; a bearing placed in the hole of the wall of the crankcase and configured to rotatably support the first shaft; an annular plate fixed to the first side wall of the first crank web, a part of the annular plate being spaced apart from the first side wall, a centrifugal filter formed by the first side wall and the annular plate, the centrifugal filter being closed on a radially outer side and being open on a radially inner side; a first oil path communicating with the centrifugal filter and configured to guide lubricant to the centrifugal filter; and a second oil path configured to connect between the centrifugal filter and a gap between the connecting rod and the crankpin, wherein: the second oil path includes a first channel hole formed inside the crankpin and extending in an axial direction of the crankpin, and a second channel hole formed inside the crankpin and extending in a radial direction of the crankpin, the second channel hole communicating with the first channel hole; a front end of the transmission is located rearward of a rear end of the cylinder; the transmission is placed rearward of the centrifugal filter; and a part of the transmission overlaps with the centrifugal filter, as the vehicle is seen from the front. the second oil path includes a first channel hole formed inside the crankpin and extending in an axial direction of the crankpin, and a second channel hole formed inside the crankpin and extending in a radial direction of the crankpin, the second channel hole communicating with the first channel hole; a front end of the transmission is located rearward of a rear end of the cylinder; the transmission is placed rearward of the centrifugal filter; and a part of the transmission overlaps with the centrifugal filter, as the vehicle is seen from the front.