4. (1) The complete throttle control system shall be inspected and tested while the engine is running and the motor tricycle is stationary with the transmission in neutral and, (a) the engine speed shall drop to idle when a spring return throttle control is released; (b) the motor tricycle shall be equipped with a supplemental engine stopping device and the engine shall stop and remain stopped when the control is actuated; (c) the engine speed shall not change with the movement of the steering from lock to lock; and (d) if originally fitted with an electronic stability control system, such system shall not be missing and there shall be no indication of a malfunction in the system. (2) In the case of power boosted steering, the power steering drive belt, reservoir fluid level, all electrical components of an electric power system and system operation shall be inspected and, (a) the power steering drive belt shall not be missing, cut, frayed or excessively worn, and shall have correct tension; (b) the fluid in the power steering reservoir shall not be lower than the minimum level specified by the vehicle manufacturer; and (c) with the engine running, the power steering system, (i) shall operate as intended, and (ii) the hydraulic system shall not show excessive fluid leakage. (3) The steering column, other steering components and the handlebars shall be inspected and tested and, (a) the steering column, other steering components and handlebars shall not be loose in their mountings to the body and frame; (b) no bolt or nut shall be loose or missing from a mounting; (c) steering shaft couplings and splines shall not have excessive play; (d) if fitted, the steering column energy absorbing section shall not be visibly damaged so as to reduce its effectiveness; and (e) no part of the handlebar shall exceed a height of 380 millimetres above the uppermost portion of the operator’s seat when the seat is depressed by the weight of the operator. (4) Front wheel alignment shall be inspected while all wheels are on the ground and the front wheels in the straight ahead position, and they shall not be visibly out of alignment. (5) The steering mechanism shall be tested for freedom of movement with the front wheels on the ground in the straight ahead position and, where a vehicle is equipped with power boosted steering, with the engine operating, and there shall be no free movement of the handlebars or the steering wheel rim without the front wheels moving, except to the extent permitted by the manufacturer’s specifications. (6) The steering linkage joints shall be examined and there shall not be excessive play in any steering linkage joint. (7) The steering mechanism shall be tested for freedom of movement with the front wheels on the ground and, where a vehicle is equipped with power boosted steering, with the engine operating, and the front wheels shall turn from full right to full left and back again without interference or indication of roughness in the mechanism. (8) The steering linkage shall be inspected and tested for wear, damage, and maladjustment while the front wheels are off the ground and the vehicle is supported so that the steering linkage assumes its normal attitude and, (a) without movement of the opposite wheel, no front wheel shall have play about a vertical axis of, (i) six millimetres for a tire diameter designation of sixteen or less, (ii) nine millimetres for a tire diameter designation that is larger than sixteen but not larger than eighteen, or (iii) twelve millimetres for a tire diameter designation that is larger than eighteen, as measured at the extreme front or rear of the tire tread face; (b) no part of the steering linkage system shall be damaged, repaired or modified so as to visibly weaken the linkage system or affect the proper steering of the vehicle; and (c) no nut, bolt or cotter pin shall be loose, excessively worn or missing. suspension