South Australian Consolidated Regulations South Australian Consolidated Regulations25—Modification of motor vehicles
(1) A motor vehicle
must not be driven or towed on a road if it does not comply with the
requirements of this regulation.
(2) If a motor vehicle
is driven or towed in contravention of subregulation (1), the driver and
the owner and the operator of the vehicle are each guilty of an offence.
(3) A car,
car-type utility or car-type panel van must not be altered from its
specification as originally manufactured in any of the following respects:
(a)
fitting of an engine of greater displacement volume, or of greater power or
torque output, than an engine available as an option for the vehicle so as to
exceed the efficient functioning capacity of the braking system provided for
the vehicle;
(b)
fitting of an engine of greater displacement volume, or of greater power or
torque output, than an engine available as an option for the vehicle with the
braking system provided at the time of manufacture of the vehicle;
(c)
modification to a braking system—
(i)
that consists of fitting of a smaller diameter brake
drum, or narrower brake drum or brake shoe that reduces the swept area of
braking surface; or
(ii)
that reduces the mass of a brake drum or disc;
(d)
widening of the wheel track of front or rear wheels by more than
26 millimetres beyond the maximum specified by the vehicle manufacturer;
(e)
fitting of spacers between wheels and hubs additional to any provided by the
vehicle manufacturer;
(f)
fitting of wheel nuts that do not engage the thread of the wheel studs for at
least the same length as the nuts provided by the vehicle manufacturer, or
wheel nuts that do not match with the taper on the wheel;
(g)
modifications to axles or suspension (including axle housings or supporting
structures but not including springs, dampers, bushes or ball joints) that
reduce the available suspension travel from static conditions to full bump
position by more than one-third of that provided by the vehicle manufacturer;
(h)
modifications to axles or suspension such that any part of the vehicle other
than the tyre or rim will contact a road surface in the case of the deflation
of any tyre;
(i)
welding or heating of axles, stub axles, steering arms or
steering knuckle supports;
(j)
lengthening or shortening of the chassis frame or of a mono-construction
(chassis-less) body structure;
(k)
alterations affecting any steering components or the steering geometry.
(4) A motor vehicle
with a GVM of 4.5 tonnes or less (not being a car, car-type utility,
car-type panel van or motor bike) must not be altered from its specification
as originally manufactured in any of the following respects:
(a)
fitting of an engine of greater displacement volume, or of greater power or
torque output, than an engine available as an option for the vehicle;
(b)
alterations to a braking system;
(c)
widening of the wheel track of the front or rear wheels by more than
26 millimetres beyond the maximum specified by the vehicle manufacturer;
(d)
fitting of spacers between wheels and between wheels and hubs additional to
any provided by the vehicle manufacturer;
(e)
fitting of wheel nuts that do not engage the thread of the wheel studs for at
least the same length as the nuts provided by the vehicle manufacturer, or
wheel nuts that do not match with the taper on the wheels;
(f)
alterations to the wheelbase;
(g)
alterations to the number of axles;
(h)
alterations affecting any steering components or the steering geometry;
(i)
replacement of any axle with another axle other than an
axle available as an option provided by the vehicle manufacturer for the
vehicle.
(5) A motor vehicle
(not being a bus) with a GVM over 4.5 tonnes must not be modified from its
specification when first registered in any of the following respects:
(a)
fitting of an engine with a maximum power or torque output outside the range
of engines available for the vehicle from the original manufacturer of the
vehicle at the time of its manufacture;
(b)
alteration of the steering components from those provided in the vehicle or
available as options for the vehicle from the original manufacturer of the
vehicle at the time of its manufacture;
(c)
alteration of the steering geometry from that designed for the vehicle by the
original manufacturer of the vehicle;
(d)
alteration of the braking system so that the braking efficiency of the vehicle
is reduced;
(e)
alteration of the wheelbase;
(f)
alteration of the number of axles;
(g)
alteration of the suspension system.