Patent ID: 6729294
Filing Date: 2004-05-04
Classification: F02B,F02F

Abstract:
A V-type engine for a motorcycle having a first bank with a first cylinder coupled to a first cylinder head and a second bank having a second cylinder coupled to a second cylinder head being arranged in a V-shape in a plane orthogonal to the axis of a crankshaft with a length between a cross point at which cylinder axes of the first and second cylinders cross each other in said plane and a deck surface of the first cylinder head and a length between said cross point and a deck surface of the second cylinder head being set to be different relative to each other comprising:a plurality of fins aligned in the direction along the cylinder axes of the first and second cylinders are provided on sides of the first and second cylinders or sides of dummy covers for covering at least part of the first and second cylinders from the sides and sides of the first and second cylinder heads or sides of the dummy covers for covering at least part of the first and second cylinder heads from the sides; wherein the total numbers of the fins and center line mutual distances of the fins are almost equal in the first and second banks, and lengths in said plane between the center lines of the fins closest to the crankshaft of said fins and said cross point are set to be almost equal in the first and second banks.