Throttle lever unit

A throttle lever unit 26 has a first lever 102 provided partially within, and moveable within and relative to, a housing 100. An element 116 protrudes from the lever, biased towards, and in contact with a removeable member 106 positioned in the housing which defines a path along which the biased member moves when the lever moves. The biased member may be a sprung wedge provided on a lateral side of the lever. The removeable member may be removed from the housing without removal of the lever or housing. A kit may include a removeable member presenting an obstruction free path along which the biased element can move and/or a path with a number of detent recesses, together with the biased wedge this forms a detent mechanism to arrest or resist movement of the lever relative to the housing when the wedge is received a recess. Movement of the detent mechanism may be transverse to the lever movement direction. A second lever 104 may be provided, moveable with, or independently of, the first lever, the removeable member between the levers.