Patent ID: 8905181

Claim:
A motorcycle internal combustion engine includes a crankcase of the internal combustion engine with an oil filter being mounted on a front face thereof and engine hangers formed integrally with the crankcase on the front face thereof, each engine hanger having a hanger boss configured to be fastened to a vehicle body frame of a motorcycle from a vehicle left-right direction, comprising: the engine hangers are formed to be distributed on left and right sides on the front face of the crankcase; the oil filter is arranged to be offset to one side in a width direction of the internal combustion engine with the oil filter being positioned in alignment with and between the left and right engine hangers; and the engine hangers and the oil filter overlap each other in a vehicle side view and one of the engine hangers includes an avoiding portion that is disposed directly adjacent to the oil filter and includes a recessed shape configured to conform to the shape of the oil filter for protecting the oil filter.