Patent ID: 7614380

Claim:
An intake system of a motorcycle, comprising: an air cleaner connected to an upstream side of an intake passage, the intake passage being connected to an intake port of a cylinder of an engine, said air cleaner including: an air cleaner case having an expansion chamber, the intake passage being connected to the expansion chamber; an element; and an intake duct for introducing outside air into the air cleaner case; and resonators provided on the air cleaner, the resonators being individually provided in communication with the expansion chamber and the intake duct, wherein a pair of said intake ducts are provided on left and right sides of the air cleaner case, the intake duct on a first side is made longer than the intake duct on a second side, and a capacity of the resonator provided on the intake duct on the first side is larger than a capacity of the resonator provided on the intake duct on the second side.