Regulation No. 63-01

Name:Regulation No. 63-01
Description:Noise - Mopeds.
Official Title:Uniform Provisions Concerning the Approval of: Two-wheeled Mopeds with Regard to Noise.
Country:ECE - United Nations
Date of Issue:1985-06-24
Amendment Level:01 Series, Supplement 1
Number of Pages:33
Vehicle Types:Motorcycle
Subject Categories:Prior Versions
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Keywords:

moped, approval, test, regulation, exhaust, type, engine, system, sound, surface, paragraph, noise, silencing, annex, measured, series, requirements, amendments, speed, maximum, measurements, track, made, measurement, number, level, area, voids, mopeds, microphone, figure, absorption, granted, content, conditions, measuring, tests, order, fitted, means, regard, texture, cores, line, approved, manufacturer, production, applying, method, accordance

Text Extract:

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E/ECE/324 )
E/ECE/TRANS/505 ) Rev.1/Add.62/Amend.2
November 14, 2006
STATUS OF UNITED NATIONS REGULATION
ECE 63
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
TWO-WHEELED MOPEDS WITH REGARD TO NOISE
Incorporating:
00 series of amendments
Date of Entry into Force: 15.08.85
01 series of amendments
Date of Entry into Force: 08.03.99
Corr. 1 to the 01 series of amendments
Dated: 23.06.99
Corr. 2 to the 01 series of amendments
Dated: 05.06.01
Supplement 1 to the 01 series of amendments
Date of Entry into Force: 10.10.06

REGULATION NO. 63
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF
TWO-WHEELED MOPEDS WITH REGARD TO NOISE
CONTENTS
REGULATION
1. Scope
2. Definitions
3. Application for Approval
4. Markings
5. Approval
6. Specifications
7. Modifications of the Moped Type or of the Type of Exhaust or Silencing System
8. Conformity of Production
9. Penalties for Non-conformity of Production
10. Transitional provisions
11. Production Definitely Discontinued
12. Names and Addresses of Technical Services Responsible for Conducting Approval Tests,
and of Administrative Departments
ANNEXES
Annex 1

Communication Concerning the Approval (or Refusal or Withdrawal of Approval or
Production Definitely Discontinued) of a Moped Type with Regard to Noise Pursuant
to Regulation No. 63.
Annex 2 – Arrangements of Approval Marks
Annex 3 – Methods and Instruments for Measuring the Noise made by Mopeds
Annex 4 – Maximum Sound Level Limits (New Mopeds)
Annex 5 – Test Track Specifications

2.4. "Exhaust or silencing systems of different types" means exhaust or silencing systems
which differ in such essential respects as:
2.4.1. that their components bear different trade names or marks;
2.4.2. that the characteristics of the materials constituting a component are different or that the
components differ in shape or size;
2.4.3. that the operating principles of at least one component are different;
2.4.4. that their components are assembled differently;
2.5. "Exhaust system component" means one of the individual constituent parts which, when
assembled, constitute the exhaust system (e.g, exhaust pipes, silencer) and, where
applicable, the intake device (air filter).
If the engine is fitted with an intake device (air filter and/or an intake noise absorber
essential in order to ensure conformity with noise-level limits), this device shall be
considered to be a component of the same importance as the exhaust system proper, and
be included in the list referred to in Paragraph 3.2.2. and carry the markings prescribed in
Paragraph 4.1.
3. APPLICATION FOR APPROVAL
3.1. The application for approval of a moped type with regard to noise made by mopeds shall be
submitted by its manufacturer or by his duly accredited representative.
3.2. It shall be accompanied by the under mentioned documents in triplicate and the following
particulars:
3.2.1. a description of the moped type with regard to the items mentioned in Paragraph 2.2. above.
The numbers and/or symbols identifying the engine type and the moped type shall be
specified;
3.2.2. a list of the components, duly identified, constituting the exhaust or silencing system;
3.2.3. a drawing of the assembled exhaust or silencing system and an indication of its position on
the moped;
3.2.4. detailed drawings of each component to enable it to be easily located and identified, and a
specification of the materials used.
3.3. At the request of the technical service responsible for conducting approval tests, the moped
manufacturer shall, in addition, submit a sample of the exhaust or silencing system.
3.4. A moped representative of the moped type to be approved shall be submitted to the
technical service responsible for conducting approval tests.

5.5. If the moped conforms to a moped type-approved, under one or more Regulations annexed
to the Agreement, in the country which has granted approval under this Regulation, the
symbol prescribed in Paragraph 5.4.1. need not be repeated; in such a case the Regulation
and approval numbers and the additional symbols of all the Regulations under which
approval has been granted in the country which has granted approval under this Regulation
shall be placed in vertical columns to the right of the symbol prescribed in Paragraph 5.4.1.
5.6. The approval mark shall be clearly legible and indelible.
5.7. The approval mark shall be placed close to or on the moped data plate.
5.8. Annex 2 to this Regulation gives arrangements of approval marks.
6. SPECIFICATIONS
6.1. General Specifications
6.1.1. The moped, its engine and its exhaust or silencing system shall be so designed, constructed
and assembled as to enable the moped, in normal use, despite the vibration to which it may
be subjected, to comply with the provisions of this Regulation.
6.1.2. The exhaust or silencing system shall be so designed, constructed and assembled as to be
able to resist the corrosive action to which it is exposed.
6.2. Specifications Regarding Sound Levels
6.2.1. Method of Measurement
6.2.1.1. The noise made by the moped type submitted for approval shall be measured by the two
methods described in Annex 3 to this Regulation for the moped in motion and for the moped
when stationary.
6.2.1.2. The two values measured in accordance with the provisions of Paragraph 6.2.1.1. above
shall be entered in the test report and on a form conforming to the model in Annex 1 to this
Regulation.
6.2.1.3. The sound level measured by the method described in Annex 3 Paragraph 3.1. to this
Regulation when the moped is in motion shall not exceed the limits prescribed (for new
mopeds and new exhaust or silencing systems) in Annex 4 to this Regulation for the
category to which the moped belongs.

10. TRANSITIONAL PROVISIONS
10.1. As from the official date of entry into force of the 01 series of amendments, no Contracting
Party applying this Regulation shall refuse to grant ECE approval under this Regulation as
amended by the 01 series of amendments.
10.2. As from June 17, 1999, Contracting Parties applying this Regulation shall grant
ECE approvals only if the moped-type to be approved meets the requirements of this
Regulation as amended by the 01 series of amendments.
10.3. Contracting Parties applying this Regulation shall not refuse to grant extensions of approval
in accordance with the preceding series of amendments to this Regulation.
10.4. Contracting Parties applying this Regulation shall continue to grant approvals to those types
of mopeds which conform to the requirements of this Regulation as amended by the
preceding series of amendments until June 17, 1999 only.
10.5. ECE approvals granted under this Regulation before June 17, 1999 and all extensions of
such approvals, including those granted subsequently under a preceding series of
amendments to this Regulation, shall remain valid indefinitely. When the moped type
approved under the preceding series of amendments meets the requirements of this
Regulation as amended by the 01 series of amendments, the Contracting Party which
granted the approval shall so notify the other Contracting Parties applying this Regulation.
10.6. No Contracting Party applying this Regulation shall refuse national type approval of a
moped type approved under the 01 series of amendments to this Regulation or meeting the
requirements thereof.
10.7. Until June 17, 2003 no Contracting Party applying this Regulation shall refuse national type
approval for a moped type approved in accordance with the 01 series of amendments to this
Regulation.
10.8. As from June 17, 1999 Contracting Parties applying this Regulation may refuse first national
registration (first entry into service) of a moped which does not meet the requirements of the
01 series of amendments to this Regulation.
11. PRODUCTION DEFINITELY DISCONTINUED
If the holder of the approval completely ceases production of a type of moped approved in
accordance with this Regulation, he shall so inform the authority which granted the
approval, which in turn shall notify the other Parties to the 1958 Agreement applying this
Regulation, by means of a copy of the communication form conforming to the model in
Annex 1 to this Regulation.
12. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS, AND OF ADMINISTRATIVE DEPARTMENTS
The Parties to the Agreement which apply this Regulation shall communicate to the United
Nations Secretariat the names and addresses of the technical services responsible for
conducting approval tests and of the administrative departments which grant approval and
to which forms certifying approval or refusal or withdrawal of approval, issued in other
countries, are to be sent.

11. Cylinder capacity .......................................................................................................................
11.1. Bore:........................................................................................................................... mm
11.2. Stroke:........................................................................................................................ mm
12. Engine power (state how measured) .........................................................................................
13. Engine speed at which maximum power is developed...................................................... min
14. Number of gears ........................................................................................................................
14.1. gears used .......................................................................................................................
14.2. final drive ratio(s) .............................................................................................................
15. Type and dimensions of tyres ....................................................................................................
16. Maximum permissible gross weight....................................................................................... kg
17. Maximum design speed (as indicated by the manufacturer) ............................................. km/h
18. Brief description of the exhaust or silencing system..................................................................
...................................................................................................................................................
19. Load conditions of moped during test........................................................................................
20. For stationary moped test: location and orientation of the microphone (by reference to
diagram in Appendix to Annex 3)...............................................................................................
21. Sound levels:
Moped in motion.................................................................................dB(A) at approach speed
(Line A-A') of ....................................................... km/h, rotation speed of the engine ....... rpm
Moped stationary.............................................................................. dB(A) with engine running
at ....... rpm
22. Deviations in calibration of sound level meter ...........................................................................
23. Moped submitted for approval on ..............................................................................................
24. Technical service responsible for conducting approval tests ....................................................
...................................................................................................................................................

ANNEX 2
ARRANGEMENTS OF APPROVAL MARKS
Model A
(See Paragraph 5.4 of this Regulation)
The above approval mark affixed to a moped shows that the moped type concerned has, with regards to
noise, been approved in the Netherlands (E 4) pursuant to Regulation No. 63 under approval number
012439. The approval number indicates that the approval was granted in accordance with the
requirements of Regulation No. 63 already included the 01 series of amendments.
Model B
(See Paragraph 5.5 of this Regulation)
The above approval mark affixed to a moped shows that the moped type concerned has been approved
in the Netherlands (E 4) pursuant to Regulations Nos. 63 and 33. The approval numbers indicate that,
at the dates when the respective approvals were given, already included the 01 series of amendments
and Regulation No. 33 has also been amended by the 01 series of amendments.

2.1.3. Miscellaneous
Measurements shall not be made in poor weather conditions. Precautions shall be taken to
ensure that readings are not influenced by wind gusts.
For measurement purposes, the weighted sound-level (A) of sound sources on the test
vehicle and the sound-level produced by the effect of the wind shall be at least 10 dB(A)
below the noise-level produced by the vehicle. The microphone may be fitted with a
suitable wind guard, provided that its influence on the sensitivity and directional
characteristics of the microphone are taken into account.
If the difference between ambient and measured noise-levels is between 10 and 16 dB(A),
the appropriate figure shall be subtracted from the value recorded by the sound-level metre,
in accordance with the following graph:

3.1.2. Determination of the Approach Speed
3.1.2.1. Approach speed
The moped shall approach the Line AA' at a steady speed equal to its maximum speed if
the latter is below or equal to 30 km/h. If the maximum speed is above 30 km/h, the vehicle
shall approach AA' at a steady speed of 30 km/h.
3.1.2.2. If the moped is fitted with a manually-operated gearbox, the highest gear shall be selected
which enables it to pass over the Line AA' with an engine speed above or equal to one half
the engine speed at which the engine produces its maximum power.
3.1.2.3. If the moped is fitted with automatic transmission, it shall be driven at the speeds indicated
in 3.1.2.1.
3.2. Measurement of Noise Emitted by Stationary Mopeds (conditions and method of
measurement for testing vehicles in service)
In addition, in order to facilitate subsequent testing of mopeds in service, the sound
pressure level shall be measured close to the outlet of the exhaust (silencing) system, in
accordance with the following requirements, and the reading shall be recorded in the test
report prepared for the issue of the document referred to in Annex 1.
The measurements shall be made using a precision sound-level metre conforming to the
requirements of Paragraph 1.
3.2.1. Test site - Local Conditions (see Appendix, Figure 2)
3.2.1.1. Measurements shall be made on a stationary moped in an area which does not present a
great deal of disturbance to the sound field.
3.2.1.2. Every open space shall be considered as a suitable test site if it consists of a flat area
covered with concrete, asphalt or some other hard material having a high reflective capacity,
excluding compressed or other earth surfaces, in which one can trace a rectangle whose
sides are at least 3 m from the extremities of the moped and inside which there is no
noticeable obstacle; in particular, the moped shall not be positioned at a distance of less
than 1 m from a pavement edge when the exhaust noise is measured.
3.2.1.3. Nobody shall be in the measurement area, except the observer and the driver, whose
presence must have no influence on the meter reading.

3.2.3.3.2.1. Engine speed shall be held steady at one of the following values:
½ S, if S exceeds 5,000 rpm,
¾ S, if S does not exceed 5,000 rpm
where S is the engine speed at which the engine produces its maximum power.
3.2.3.3.2.2. When the constant engine speed is reached, the throttle shall be returned swiftly to the idle
position. The sound level shall be measured during a period of operation consisting of a
brief maintenance of the constant engine speed and throughout the deceleration period.
3.2.3.3.3. The values rounded off to the nearest whole decibel, shall be read from the measuring
apparatus. If the figure following the decimal point is between 0 and 4, the total is rounded
down and if between 5 and 9, it is rounded up.
Only values which are obtained from three consecutive measurements which do not differ
by more than 2 dB(A) shall be accepted.
The highest of the three measurements will constitute the test result.
4. INTERPRETATION OF RESULTS FOR VEHICLES IN MOTION
The values taken shall be rounded off to the nearest whole decibel. If the figure following
the decimal point is between 0 and 4, the total is rounded down and if between 5 and 9, it is
rounded up.
Only the values of readings obtained from two consecutive measurements made on the
same side of the vehicle and not differing by more than 2 dB(A) shall be accepted.
To allow for lack of precision in the readings, the result of each measurement shall be taken
as equal to the value obtained, less 1 dB(A).
If the average of the four readings does not exceed the maximum permissible level for the
category to which the tested vehicle belongs, the limit specified in Paragraph 6.2.1.3. shall
be deemed as being complied with. This average value shall constitute the test result.
5. ORIGINAL EXHAUST (SILENCING) SYSTEM
5.1. Requirements for silencers containing absorbent fibrous materials.
5.1.1. Fibrous absorbent material must be asbestos-free and may be used in the construction of
silencers only if suitable devices ensure that the fibrous absorbent material is kept in place
for the whole time that the silencer is being used and it meets the requirements of any one
of Sections 5.1.2., 5.1.3. or 5.1.4.
5.1.2. After removal of the fibrous material, the sound level must conform to the requirements of
Annex 4.
5.1.3. The fibrous absorbent material may not be placed in those parts of the silencer through
which the exhaust gases pass and must conform to the following requirements:
5.1.3.1. The material shall be heated at a temperature of 650 ± 5º C for four hours in a furnace
without reduction in the average length, diameter or bulk density of the fibre;

5.1.4.2.4. The time-delay switch must be set for the duration of exhaust gases calculated on the basis
of the requirements of Paragraph 5.1.4.2.3. above.
5.1.4.2.5. Engine speed must be 75% of the speed (S) at which the engine develops maximum power.
5.1.4.2.6. The power indicated by the dynamometer must be 50% of the full-throttle power measured
at 75% of engine speed (S).
5.1.4.2.7. Any drainage holes must be closed off during the test.
5.1.4.2.8. The entire test must be completed within 48 hours. If necessary, a cooling period must be
allowed after each hour.
5.1.4.3. Conditioning on a test bench.
5.1.4.3.1. The exhaust system must be fitted to an engine representative of the type fitted to the
moped for which the system is designed, and mounted on a test bench.
5.1.4.3.2. Conditioning shall consist of three cycles.
5.1.4.3.3. Each test-bench cycle must be followed by a break of at least six hours in order to
reproduce the effects of cooling and condensation.
5.1.4.3.4. Each test-bench cycle shall consist of six phases. The engine conditions for and the
duration of each phase shall be:
Phase
1
2
3
4
5
6
Conditions
Idling
25% load at 75% of S
50% load at 75% of S
100% load at 75% of S
50% load at 100% of S
25% load at 100% of S
Total time
Duration of each phase
(in minutes)
6
40
40
30
12
22
2 hrs 30 mins
5.1.4.3.5. During this conditioning procedure, at the request of the manufacturer, the engine and the
silencer may be cooled in order that the temperature recorded at a point not more than
100 mm from the exhaust gas outlet does not exceed that measured when the moped is
running at 75% of S in top gear. The engine and/or moped speeds shall be determined to
within ± 3%.
5.2. Diagram and Markings
5.2.1. The diagram and a dimensioned cross section of the silencer shall be annexed to the
document mentioned in Annex 1.
5.2.2. All original exhaust or silencing systems shall be marked with clearly legible and indelible
make and type references.

ANNEX 3 - APPENDIX
MEASURING POSITIONS FOR MOPEDS IN MOTION
Figure 1
Measuring Positions Stationary Mopeds
Figure 2

ANNEX 4
MAXIMUM SOUND LEVEL LIMITS (NEW MOPEDS)
Category of two-wheeled mopeds
≤ 25 km/h
> 25 km/h
Maximum noise-level values in
dB(A)
66
71

2.5. Period of Testing
In order to check whether the surface continues to conform to the texture and voids content or
sound absorption requirements stipulated in this standard, periodic testing of the surface shall be
done at the following intervals:
(a)
For residual voids content or sound absorption:
when the surface is new;
if the surface meets the requirements when new, no further periodical testing is
required. If it does not meet the requirement when it is new, it may do later because
surfaces tend to become clogged and compacted with time.
(b)
For texture depth (TD):
when the surface is new;
when the noise testing starts (NB: not before four weeks after laying);
then every 12 months.

3.2. Design and Preparation of the Surface
3.2.1. Basic Design Requirements
The test surface shall meet four design requirements:
3.2.1.1. It shall be a dense asphaltic concrete.
3.2.1.2. The maximum chipping size shall be 8 mm (tolerances allow from 6.3 to 10 mm).
3.2.1.3. The thickness of the wearing course shall be ≥ 30 mm.
3.2.1.4. The binder shall be a straight penetration grade bitumen without modification.
3.2.2. Design Guidelines
As a guide to the surface constructor, an aggregate grading curve which will give desired
characteristics is shown in Figure 2. In addition, Table 1 gives some guidelines in order to
obtain the desired texture and durability. The grading curve fits the following formula:
P (% passing) = 100 . (d/d ) 1/2
where:
d
=
square mesh sieve size, in mm
d
=
8 mm for the mean curve
d
=
10 mm for the lower tolerance curve
d
=
6.3 mm for the upper tolerance curve

Table 1
Design Guidelines
Mass of stones, square mesh sieve (SM) > 2 mm
Mass of sand 0.063 < SM < 2 mm
Mass of filler SM < 0.063 mm
Mass of binder (bitumen)
Max. chipping size
Binder hardness
Polished stone value (PSV)
Compactness, relative to Marshall compactness
Target values
By total
mass of
mix
47.6%
38.0%
8.8%
5.8%
By mass
of the
aggregate
50.5%
40.2%
9.3%
N.A.
8 mm
(see Paragraph 3.2.2. (f))
> 50
98%
Tolerances
± 5
± 5
± 2
± 0.5
6.3 - 10
4. TEST METHOD
4.1. Measurement of the Residual Voids Content
For the purpose of this measurement, cores have to be taken from the track in at least four
different positions which are equally distributed in the test area between Lines AA and BB
(see Figure 1). In order to avoid inhomogeneity and unevenness in the wheel tracks, cores
should not be taken in wheel tracks themselves, but close to them. Two cores (minimum)
should be taken close to the wheel tracks and one core (minimum) should be taken
approximately midway between the wheel tracks and each microphone location.
If there is a suspicion that the condition of homogeneity is not met (see Paragraph 2.4.), cores
shall be taken from more locations within the test area. The residual voids content has to be
determined for each core, then the average value from all cores shall be calculated and
compared with the requirement of Paragraph 2.1. In addition, no single core shall have a voids
value which is higher than 10%. The test surface constructor is reminded of the problem which
may arise when the test area is heated by pipes or electrical wires and cores must be taken
from this area. Such installations must be carefully planned with respect to future core drilling
locations. It is recommended to leave a few locations of size approximately 200 x 300 mm
where there are no wires/pipes or where the latter are located deep enough in order not to be
damaged by cores taken from the surface layer.

6. DOCUMENTATION OF THE TEST SURFACE AND OF TESTS PERFORMED ON IT
6.1. Documentation of the Test Surface
The following data shall be given in a document describing the test surface:
6.1.1. The location of the test track.
6.1.2. Type of binder, binder hardness, type of aggregate, maximum theoretical density of the
concrete (D ), thickness of the wearing course and grading curve determined from cores from
the test track.
6.1.3. Method of compaction (e.g. type of roller, roller mass, number of passes).
6.1.4. Temperature of the mix, temperature of the ambient air and wind speed during laying of the
surface.
6.1.5. Date when the surface was laid and contractor.
6.1.6. All or at least the latest test results, including:
6.1.6.1. The residual voids content of each core.
6.1.6.2. The locations in the test area from where the cores for voids measurements have been taken.
6.1.6.3. The sound absorption coefficient of each core (if measured). Specify the results both for each
core and each frequency range as well as the overall average.
6.1.6.4. The locations in the test area from where the cores for absorption measurement have been
taken.
6.1.6.5. Texture depth, including the number of tests and standard deviation.
6.1.6.6. The institution responsible for tests according to Paragraphs 6.1.6.1. and 6.1.6.2. and the type
of equipment used.
6.1.6.7. Date of the test(s) and date when the cores were taken from the test track.
6.2. Documentation of Vehicle Noise Tests Conducted on the Surface
In the document describing the vehicle noise test(s) it shall be stated whether all the
requirements of this standard were fulfilled or not. Reference shall be given to a document
according to Paragraph 6.1. describing the results which verify this.
Noise - Mopeds.