Saddle-ride type vehicle

• Main Authors: ISHIDA, Shuichi, TANI, Yusaburo, HOI, Yosuke, ASANO, Tatsuhiko, AZUMAGAKITO, Isao, OKADA, Nozomi
• Format: Patent
• Language: English
• Published: 26.09.2019
• Subjects: CYCLES; LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; PERFORMING OPERATIONS; POWERED PROPULSION OF SLEDGES OR; RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES; TRANSPORTING

SADDLE-RIDE TYPE VEHICLE A saddle-ride type vehicle in which a single-cylinder engine main unit (20) is mounted on a body frame (F), the engine main unit (20) having: a crankcase (28); a cylinder body (29) rising upward from an upper portion of the crankcase (28); a cylinder head (30) connected to an upper portion of the cylinder body (29); and a head cover (31) connected to an upper portion of the cylinder head (30), the cylinder head (30) includes a front wall (30a) connected to an exhaust system (41) and a rear wall (30b) connected to an intake system (46), wherein ajoining surface (38) of the cylinder head (30) to the head cover (31) is formed on a plane crossing a cylinder axis, the plane being inclined downward toward a front, rotation axes of camshafts (104, 105) are arranged on the plane, the rotation axes of camshafts (104, 105) configuring a part of a valve train opening/closing an intake valve (100) and an exhaust valve (101) respectively supported by the cylinder head (30), an axis of a valve stem (131) of a butterfly throttle valve (130) is arranged on the plane, the butterfly throttle valve (130) being provided to a throttle device configuring a part of the intake system (146), a curve cover (116) is formed on one side in a vehicle width direction of the head cover (31), the curve cover (116) being curved to cover driven sprockets (113, 114) that are fixed to the camshafts (104, 105) so that a cam chain (83) for transmitting power from a crankshaft to the camshafts (104, 105) is wound around the driven sprockets (113, 114), and a drum housing box (135) is arranged close to the curve cover (116), the drum housing box (135) housing a throttle drum (132) fixed to one end of the valve stem, the drum housing box (135) being annexed to the throttle device. CY) CO) CV)o Co) 00c o LL