VVTYPE OR HORIZONTALLY OPPOSED TYPE FOUR CYCLE ENGINE FOR MOTORCYCLE

摘要

PURPOSE:To reduce the width of a V-type or horizontally opposed type four cycle engine for motor cycle by utilizing a recess in the cylinder. CONSTITUTION:An engine comprises a speed changer housing 20 to the top of which the lower end of an cylinder block 10 is fixed and an oil pan 30. A recess is formed on the side of a right forward cylinder 101 and of a left rear cylinder 102 respectively in which linking mechanisms 61 and 62 to link cam drive mechanisms 51 and 52 to a crank shaft 40 are installed whereby the width of the engine is reduced as compared with conventional engine which has such linking mechanisms 61 and 62 installed on the same side of the cylinder.