TH57558B - Engine mounting arrangement for two-wheeled vehicles - Google Patents

Abstract

DC60 in order to provide a motorcycle that can lower the position of the main frame parts to The lowest possible position, as well as positioning the working components between the power units chambers. And main frame parts The motorcycle (1) will have main frame parts (4) that extend behind the control head tube (3) and the power unit (20) with chambers (23) suspended from the main frame parts (4) and the chambers ( 23) of the power unit (20), the upper surface (23a) is made at a distance from the main frame (4) when the top surface (23a) extends to the front of the power unit (20) and the working component ( 101) of the power units (20) will be positioned. Between the top surface (23a) of the chamber (23) and the main frame (4) in order to provide a motorcycle that can lower the position of the main frame to The lowest possible position, as well as positioning the working components between the power units chambers. And main frame parts The motorcycle (1) will have main frame parts (4) that extend behind the control head tube (3) and the power unit (20) with chambers (23) suspended from the main frame parts (4) and the chambers ( 23) of the power unit (20), the upper surface (23a) is made at a distance from the main frame (4) when the top surface (23a) extends to the front of the power unit (20) and the working component ( 101) of the power units (20) will be positioned. Between the top surface (23a) of the chamber (23) and the main frame parts (4)

Claims (10)

1. A motorcycle consists of a main frame section extending rearward from the head tube, and a power unit with a housing suspended from the main frame section. The upper surface of the power unit housing is spaced away from the main frame section when it extends forward of the power unit, and the working components of the power unit are positioned between the upper surface of the housing and the main frame section. 2. The motorcycle under claim 1 is of a type in which the main frame is tilted downward as the main frame extends backward, the main frame and the upper surface of the chamber create an expansion gap to the front of the main frame, and the working components are positioned in the gap. 3. The motorcycle under claim 2 is of a type in which the chamber has a first hub at the front end of the upper surface; the hub is suspended from the main frame component via a support, and the hub extends into this space and is positioned forward from the working component. 4. Any motorcycle under any of the claims 1 through 3 is of the type in which the top surface of the chamber is beveled downwards when the top surface extends toward the front of the main frame element. 5. The motorcycle under claim 1 or 2 is of a type in which the power unit consists of an engine with cylinders protruding forward from the front end of the chamber, and the working components consist of a starter motor for starting the engine, and the starter motor protruding in the width direction of the vehicle above the crankshaft which is located in that chamber. 6. The motorcycle under claim 5 is of a type in which the power unit consists of a continuously variable transmission (CVT) of the belt-driven type attached to the engine, and the CVT consists of a first pulley driven by the engine crankshaft, a second pulley positioned behind the first pulley, a belt for transmitting torque from the first to the second pulley, and a CVT housing for enclosing the first, second, and belt, where the first pulley has a smaller diameter than the second pulley, and where the CVT housing has a sloped top surface as it extends from the first to the second pulley. 7. The motorcycle under claim 6 is of the type in which the starter motor is positioned above the first pulley. 8. The motorcycle under claim 5 is of a type in which the engine has a balance shaft located in the upper space within the chamber, and the upper surface of the chamber has a projection extending into the space at the position corresponding to the position of the balance shaft. 9. The motorcycle consists of a main frame section extending rearward from the head tube, and a power unit with a housing suspended from the main frame section. The power unit housing and the main frame section create an expansion space in front of the main frame section. The front end of the upper surface of the housing, facing the expansion space, is formed with the hub section suspended from the main frame section, and the working components of the power unit are positioned in this space. 10. The motorcycle under claim 9 is of a type in which the working component extends in the width direction of the vehicle and is positioned rearward from this hub.