Abstract: A stem includes a quill with a quill length extending along an axis. A first quill end has a cradle configured to couple to a handlebar, and a second quill end has helical slots opposite one another. A base has a base length extending along the axis. The base is configured to receive the quill. A first base end has a bracket configured to couple to a steering mast. The base has apertures opposite one another, and a second base end has a groove extending along the axis. A pin is coupled to the base perpendicular to the axis through the apertures. A releasable clamp is sized to fit around a base outer diameter. The helical slots are configured to receive the pin and slidably guide the pin along the helical slots of the quill such that the quill is rotatable within the base and relative to the base.

Abstract: A stem includes a quill with a quill length extending along an axis. A first quill end has a cradle configured to couple to a handlebar, and a second quill end has helical slots opposite one another. A base has a base length extending along the axis. The base is configured to receive the quill. A first base end has a bracket configured to couple to a steering mast. The base has apertures opposite one another, and a second base end has a groove extending along the axis. A pin is coupled to the base perpendicular to the axis through the apertures. A releasable clamp is sized to fit around a base outer diameter. The helical slots are configured to receive the pin and slidably guide the pin along the helical slots of the quill such that the quill is rotatable within the base and relative to the base.

Abstract: Systems and methods for replacing a removable assembly from a harvester for collecting and separating harvested crop product from twigs, dirt, dust, and other debris. A removable assembly for picking up harvested crop product and a removable assembly for separating the picked up harvested crop product from twigs, dirt, dust, and other debris are mounted to be changed out quickly in the field. A removable pickup assembly is received for removably mounting in the harvester by an inclined slot formed in a sidewall of the harvester body frame, so that the removable pickup assembly with the worn belt is lifted up and out and a replacement removable pickup assembly with a new belt is dropped into its place.

Abstract: Systems and methods for separating harvested crop product from twigs, dirt, dust, and other debris. A disk to be used in a harvester includes a first segment and a second segment and is configured to cooperate with adjacent disks axially mounted on a common rotational shaft, and radially cooperate with disks mounted on a parallel rotational shaft. The disks are used in a roller assembly or a harvester, and gaps between cooperating disks remain effectively constant during operation.