BS 7407:1991 download free.Specification for Vehicles, directly propelled by energy derived from a fuel, capable of carrying children.
1 Scope
BS 7407 specifies requirements for vehicles, directly propelled by energy derived from a fuel (e.g. an internal combustion engine but not an electric motor), capable of carrying children of less than 14 years of age.
The standard is not applicable to vehicles intended for use in competitions, e.g. those carried out under the control of recognized national organizations. The standard includes requirements for ATV’s (all terrain vehicle) for children up to 14 years of age, except for certain statutory requirements which are covered by legislation (see foreword).
NOTE The titles of the publications referred to in this standard are listed on the inside back cover.
2 Definition
For the purposes of this British Standard, the following definition applies.
speed limiting device
a device, requiring the use of a tool for adjustment, which enables the maximum speed of a vehicle to be preset to below 75% of the maximum speed
NOTE The maximum speed is determined in A.5.l.
3 General
Vehicles shall not catch fire when tested in accordance with A.1.
The rise in temperature of parts that are intended to be touched by the hand, e.g. handles, knobs, controls and grips shall not exceed the following values when the vehicle is operated in accordance with 4.10 of
BS 5665-1:1989:
parts of metal: 25 K
parts of glass, porcelain: :30 K
parts of plastics, wood: 35 K
The maximum speed of vehicles, excluding ATV’s, supplied shall not exceed 50 km/h when determined in accordance with A.5.1.
A speed limiting device (see clause 2) shall be fitted to all vehicles, except ATVs, to enable the maximum speed to be reduced below 50 km/h.
NOTE 1 Brittle, rough or highly flammable materials, or those which could splinter or crack dangerously under impact should be avoided in components of construction.
NOTE 2 Areas normally accessible for use or routine maintenance should be free from sharp edges, projections or finger traps.
NOTE 3 There is a general need to ensure safe and as far as possible tamper-proof assembly. Thus wiring and pipework should be securely clipped and secure anti-vibration fastenings used for suspension and other critical parts.
NOTE 4 To suppress radio interference there should be proper radio shielding or resistive leads should be used for the ignition high tcn8ion system. (See ECE Regulation 10 and ECE Directive 83/336).
NOTE 5 A warning should be included in the instructions for use referring to the fact that certain parts might get hot and should not be touched Isee item 1) of clause 61,
4 Construction
4.1 Two-wheeled vehicles (e.g. motorcycles)
4.1.1 Each wheel shall be braked. The brakes shall be capable either of being operated independently, or linked. The front. brake lever shall be on the right side handle bar, and the rear brake lever either on the left side handle bar or operated by the right foot.
4.1.2 Mudguarding shall be fitted over each wheel, projecting laterally beyond the tyres on each side. The rear mudguarding shall extend to the vertical tangent to the rear wheel.
4.1.3 Handlebar levers (clutch or brake) shall be ball ended, with a minimum 14 mm diameter ball. If flattened, the ball end shall be rounded with a minimum thickness of the flattened portion of 14 mm.
4.1.4 The ends of the footrests shall be rounded with a radius of not less than 8 mm or otherwise protected. The ends of handlebars shall be rounded. The ends of handlebars shall not be open-ended tubes.
4.1.5 The throttle (accelerator) controls shall be self-closing.
4.1.6 Any drive chains or sprockets shall be guarded. The top run of the chain shall be guarded.
4.1.7 The end(s) of exhaust pipe(s) shall not project beyond any part of the vehicle or its bodywork.
4.1.8 A handlebar mounted switch or button shall be fitted which will stop the engine when actuated. It shall require an additional action to reset.
4.1.9 A speed limiting device shall be fitted, which can be adjusted or removed by an adult as riding skills improve.
4.2 Three- or more wheeled vehicles (excluding ATV’s)
4.2.1 General
The vehicle shall have three or more road wheels with the occupants contained within the main frame of the vehicle. Not more than two occupants shall be allowed.
4.2.2 Seat belts
If fitted, seat belt harnesses shall comply with type 1 or 2, group B of BS 3254-2, and shall be fitted for each occupant. Each harness shall have two shoulder straps and fourpoint mounting.
4.2.3 Seat belt anchorages
If seat belts are fitted no part of the anchorages shall fracture or show permanent deflection of more than 10 mm when tested in accordance with A.2.
4.2.4 Roll-over bars
If a roll-over bar is fitted, no part shall fracture and the height of the bar shall not be reduced by more than 50 mm when tested in accordance with A.3.
4.2.5 Stability
None of the vehicle road wheels shall lift off the surface with the test plane at an angle of 30 % to the horizontal when tested in accordance with A.4.
4.2.6 Braking
When tested in accordance with A.5.2 the service brake shall show an average braking efficiency of at least 40 %, with an application force of less than 250 N.
When tested in accordance with A.5.3, the ten consecutive speed reductions shall all record at least 30 % efficiency.
If fitted, a parking brake shall achieve 20 % efficiency when tested in accordance with A.5.4 with an application force of less than 250 N.
4.2.7 Guarding moving parts
All chain drives, gears and other parts moving when the vehicle is at rest with the engine idling shall be completely enclosed. Body panels removable without hand-tools shall not be considered adequate enclosure.
For vehicles with one seating position no chain drives, gears, or drive joints shall be unguarded within 500 mm of the centre of the seat base. For vehicles with two seating positions, no chain drives, gears, or drive joints shall be unguarded within a radius of 500 mm of the centres of each seat base. Guards shall be fitted around the upper surfaces of wheels, tyres and the exhaust system where these are within 500 mm of any part of the seat base and not otherwise guarded.
The floor pan of the passenger space shall contain no apertures with any dimension greater than 25 mm.
4.2.8 Surface projections
The upper and rearward-facing surfaces that are forward of and within 1 000 mmofanoccupant’ship position and with which contact could be made in an impact situation shall not have exposed:
a) any edge, or corner of less than 10 mm radius;
b) any projections of less than 10 mm radius which are more than 10 mm from the mounting surface.
h) that the engine be stopped before refuelling. On filling with fuel, ensure that any spillages are cleaned up and be extra careful when filling while the engine is hot:
i) that no attempt be made to touch or allow anyone else to touch any part of the engine while the engine is running. After the engine has been stopped, certain parts remain hot and precautions should be taken;
j) that fuel lines should he examined for leaks;
k) that the user receives training on the handling of the vehicle:
l) for two-wheeled vehicles only that one child should use the machine at any one time — no pillion or other passengers except for the instructor;
m) that the brakes are adjusted in accordance with the manufacturer’s instructions and that all fittings are tight and secure;
n) that the vehicles are not used on the public highway and that access to the public highway should be blocked;
o) that the speed limiting device should only be adjusted by an adult;
p) the recommended safe maximum speeds dependent on the age of the user.