Power unit for motorcycle and motorcycle

A power unit for a motorcycle, the power unit comprising an engine, the engine comprising a crankshaft, the engine also comprising a first case, the first case defining a clutch chamber, the clutch chamber housing a centrifugal clutch, the centrifugal clutch being positioned generally rearward of the crankshaft, the engine further comprising a second case, the second case defining a transmission chamber, a continuously variable transmission provided within the transmission chamber, the continuously variable transmission comprising a primary sheave and a secondary sheave, the primary sheave being driven by the crankshaft, the secondary sheave being arranged generally coaxially with the centrifugal clutch, a flexible transmitting member extending around the primary and secondary sheaves, a support member being disposed generally below the first case, a first foot rest and a second foot rest being positioned to a first lateral side of the engine and a second lateral side of the engine respectively, the first and second foot rests being supported by the support member, the first case comprising an underside from which at least one boss depends downward, the at least one boss being positioned generally below the centrifugal clutch and each of the at least one boss comprising a lower end face to which the support member is secured.

A motorcycle comprising a frame, a power unit being suspended from the frame, the engine comprising a case, the case defining a clutch chamber, a centrifugal clutch positioned within the clutch chamber, a support member being disposed below the case of the power unit, the support member connected to a first foot rest and a second foot rest, the first and second foot rests being positioned to lateral sides of the case, the case comprises an underside, a plurality of bosses protrude downward from a portion of the underside, the portion being disposed generally below the centrifugal clutch, and the support member being secured to the bosses.