Abstract: A crossbrace, for fitting between intermediate bent sections of a motorcycle handlebar, is formed at its respective ends with a part spherical knob. It is then clamped to the bar, by way of these knobs, by two clamp portions at each end. Each clamp portion has a part spherical recess and the knob is received and clamped between these recesses. Each clamp portion also has a recess of part-circular section and the bar is received and clamped between these recesses. Each clamp portion also has one or preferably two apertures for the fasteners, such as bolts and nuts for effecting their attachment in facing and clamping disposition around the bar and the knob of the crossbrace.

Abstract: An annular plate, which is of a first material and has a toothed external periphery, is shrink fitted onto the perimeter of a disc of a second material so that there is no play between the annular plate and the disc. The perimeter of the disc includes at least one radially recessed region and the annular plate has its inner edge provided with corresponding one or more protruding regions which fit thereto. A plurality of fasteners, such as grub screws, are inserted axially at spaced intervals between the annular plate and the disc.

Abstract: A toothed annulus of steel is attached to the perimeter of an aluminium disc by means of threaded engagement. At least the perimeter edge of the disc and the inner edge of the annulus will usually be of substantially the same thickness.

Abstract: A crossbrace, for fitting between intermediate bent sections of a motorcycle handlebar, is formed at its respective ends with a part spherical knob. It is then clamped to the bar, by means of these knobs, by two clamp portions at each end. Each clamp portion has a part spherical recess and the knob is received and clamped between these recesses. Each clamp portion also has a recess of part-circular section and the bar is received and clamped between these recesses. Each clamp portion also has one or preferably two apertures for the fasteners, such as bolts and nuts for effecting their attachment in facing and clamping disposition around the bar and the knob of the crossbrace.

Abstract: A handlebar for a motorcycle or similar vehicle comprises at least one outer tubular sleeve surrounding an inner tubular member which is of constant diameter and constant wall thickness throughout. Both the outer sleeve and the inner member have a central region, flanked by symmetrical oblique regions, leading to respective handgrip regions. The multi-layer construction of the handlebar limits crack propagation and allows use of two or more different materials. With a two-layer construction, the outer tubular sleeve is preferably of constant wall thickness in its central region and of constant, yet smaller wall thickness in the handgrip regions, with a reduction in wall thickness taking place over a very short distance in the intermediate oblique regions. With a three-layer construction, the outer layers may each be of constant wall thickness, the outermost layer(s) not extending to the ends of the adjacent inner layer.

Abstract: Respective handlebar end pieces, including respective handgrip portions, are connected to opposing end regions of a central body which is formed of substantially parallel plates, usually, but not essentially, of metal.This three part construction is more resistant to impact damage than a conventional one-piece handlebar, obviates the need for a brace, and allows for adjustment of the end pieces to meet the needs for individual riders.