Regulation No. 92-00

Name:Regulation No. 92-00
Description:Exhaust Silencer Replacement Systems - Motorcycles.
Official Title:Uniform Provisions Concerning the Approval of: Non-original Replacement Exhaust Systems (RESS) for Motorcycles, Mopeds and Three-wheeled Vehicles.
Country:ECE - United Nations
Date of Issue:1993-11-01
Amendment Level:00 Series, Supplement 3
Number of Pages:19
Vehicle Types:Component, Motorcycle
Subject Categories:Prior Versions
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Keywords:

approval, ress, vehicle, regulation, type, three-wheeled, exhaust, motorcycle, system, engine, moped, test, number, components, paragraph, silencing, requirements, manufacturer, component, replacement, conditioning, load, thereof, fitted, speed, cycle, vehicles, granted, conditions, exceed, measured, production, mark, annex, amendments, duration, extension, series, systems, motorcycles, tests, time, date, level, means, maximum, mopeds, original, material, power

Text Extract:

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E/ECE/324
) Rev.1/Add.91/Amend.3
E/ECE/TRANS/505 )
November 14, 2006
STATUS OF UNITED NATIONS REGULATION
ECE 92
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
NON-ORIGINAL REPLACEMENT EXHAUST SILENCING SYSTEMS (RESS)
FOR MOTORCYCLES, MOPEDS AND THREE-WHEELED VEHICLES
Incorporating:
00 series of amendments
Date of Entry into Force: 01.11.93
Supplement 1 to the 00 series of amendments
Date of Entry into Force: 07.02.99
Supplement 2 to the 00 series of amendments
Date of Entry into Force: 09.11.05
Corr. 1 to Supplement 2 to the 00 series of amendments
Dated: 07.04.06
Supplement 3 to the 00 series of amendments
Date of Entry into Force: 10.10.06

REGULATION NO. 92
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF
NON-ORIGINAL REPLACEMENT EXHAUST SILENCING SYSTEMS (RESS)
FOR MOTORCYCLES, MOPEDS AND THREE-WHEELED VEHICLES
CONTENTS
1.
Scope
2.
Definitions
3.
Application for Approval
4.
Markings
5.
Approval
6.
Specifications
7.
Modification of the Type of RESS and Extension of Approval
8.
Conformity of Production
9.
Penalties for Non-conformity of Production
10.
Production Definitely Discontinued
11.
Names and Addresses of Technical Services Responsible for Conducting Approval Tests and of
Administrative Departments
ANNEXES
Annex 1 – Communication concerning the approval or extension or refusal or withdrawal of approval
or production definitely discontinued of a vehicle type with regard to a type of RESS or
component thereof pursuant to Regulation No. 92
Annex 2
Annex 3
– Example of the approval mark
– Requirements for fibrous absorbent materials used in RESS

2.6. "Motorcycle, moped or three-wheeled vehicle" means motorcycles, mopeds or
three-wheeled vehicles which do not differ in such essential respects as:
2.6.1. The type of engine (two-stroke of four-stroke with reciprocating or rotary pistons; number and
capacity of cylinders; number and type of carburettors or injection systems; arrangement of
valves; maximum net power and corresponding engine speed).
For rotary piston engines, the cubic capacity should be taken to be double of the volume of
the chamber;
2.6.2. Number and ratio of gears,
2.6.3. Number, type and arrangement of exhaust silencing systems.
3. APPLICATION FOR APPROVAL
3.1. The application for approval of a RESS or components thereof shall be submitted by its
manufacturer or by his duly accredited representative.
3.2. It shall be accompanied by the undermentioned documents in triplicate and the following
particulars:
3.2.1. A description of the motorcycle, moped or three-wheeled vehicle type(s) on which the RESS
or components are intended to be fitted, with regard to the items referred to in Paragraph 2.6
above. The numbers and/or symbols identifying the engine type and the motorcycle, moped
or three-wheeled vehicle type shall be specified and the motorcycle, moped or three-wheeled
vehicle type approval number, if necessary;
3.2.2. A description of the complete RESS showing the relative position of each of its components,
together with instructions for their assembly;
3.2.3. Detailed drawings of each RESS component to enable it to be easily located and identified,
and specification of the materials used. These drawings shall also indicate the location for
the mandatory affixing of the approval number.
3.3. At the request of the technical service conducting the tests for approval, the manufacturer of
the RESS shall submit:
3.3.1. Two samples of the RESS or its components submitted for approval;
3.3.2. A sample of the original exhaust silencing system with which the motorcycle, moped or
three-wheeled vehicle was equipped when submitted for type approval;

4.6. The manufacturer shall provide:
4.6.1. Instructions explaining in detail the correct method of mounting on the vehicle,
4.6.2. Instructions for handling the silencing system,
4.6.3. A list of components with the numbers of the corresponding parts, excluding retainers.
4.7. The approval mark.
5. APPROVAL
5.1. If the RESS or component thereof submitted for approval under this Regulation meets the
requirements of Paragraph 6 below, approval for that type shall be granted.
5.2. An approval number shall be assigned to each RESS type approved. Its first two digits (at
present 00 for the Regulation in its original form) shall indicate the series of amendments
incorporating the most recent major technical amendments made to the Regulation at the
time of issue of the approval. The same Contracting Party may not assign the same number
to another type of RESS or component designed for the same type(s) of motorcycle, moped
or three-wheeled vehicle.
5.3. Notice of approval or extension or refusal of approval of a RESS or component thereof under
this Regulation shall be communicated to the Parties to the Agreement which apply this
Regulation, by means of a form conforming to the model in annex l to this Regulation.
5.4. There shall be affixed to every RESS and component thereof conforming to a type approved
under this Regulation an international approval mark consisting of:
5.4.1. A circle surrounding the letter "E" followed by the distinguishing number of the country which
has granted approval;
5.4.2. The number of this Regulation, followed by the letter "R", a dash and the approval number to
the right of the circle prescribed in Paragraph 5.4.1.
5.4.3. The approval number shall be indicated in the approval form, together with the method used
for the approval tests.
5.5. The approval mark shall be easily legible when the RESS is fitted to the vehicle, and shall be
indelible.
5.6. A component may be marked with more than one approval number if it has been approved as
a part of more than one RESS; in this case the circle need not be repeated. Annex 2 to this
Regulation gives an example of the approval mark.

6.3.4. Test Method
6.3.4.1. Engine Test Method
The measurements shall be carried out on the engine referred to in Paragraph 3.3.4. above
or, if it is not available, on the engine of the motorcycle, moped or three-wheeled vehicle
referred to in Paragraph 3.3.3. above, the engine being in both cases mounted on a
dynamometer.
6.3.4.2. Motorcycle, Moped or Three-wheeled Vehicle Test Method
The measurements shall be carried out on the motorcycle, moped or three-wheeled vehicle
referred to in Paragraph 3.3.3. above. The values obtained with the original silencing system
shall be compared with those obtained with the RESS. The test shall be conducted on a
roller dynamometer.
6.4. Additional provisions regarding the RESS or its components filled with fibrous materials
The use of fibrous absorbent material shall be permitted in the construction of the RESS only
if the requirements in annex 3 are met:
6.5. Evaluation of the Emission of Pollutants of Vehicles Equipped with Replacement
Silencer System
The vehicle referred to in Paragraph 3.3.3., equipped with a replacement exhaust silencing
system (RESS) of the type for which approval is requested, shall fulfil the pollution
requirements according to the type approval of the vehicle. The evidence shall be
documented in the test report.
7. MODIFICATION OF THE TYPE OF RESS AND EXTENSION OF APPROVAL
7.1. Every modification of the type of RESS or its components shall be notified to the
administrative department which approved the type of RESS. The said department may then
either:
7.1.1. Consider that the modifications made are unlikely to have an appreciable adverse effect, or
7.1.2. Require a further test report from the technical service responsible for conducting the tests.
7.2. The manufacturer of the RESS or component thereof or his duly accredited representative
may ask the administrative department which has granted the approval of the RESS for one
or several types of motorcycle, moped or three-wheeled vehicle for an extension of the
approval to other types of motorcycle, moped or three-wheeled vehicle. The procedure shall
be as described in Paragraph 3 above.
7.3. Confirmation or refusal of approval, specifying the modifications, shall be communicated in
accordance with the procedure specified in Paragraph 5.3. above to the Parties to the
Agreement applying this Regulation.
7.4. The competent authority issuing the extension of approval shall assign a series number to
each communication form drawn up for such an extension.

ANNEX 1
COMMUNICATION
(Maximum format: A4 (210 x 297 mm))
issued by:
Name of administration:
.....................................
.....................................
.....................................
concerning:
APPROVAL GRANTED
APPROVAL EXTENDED
APPROVAL REFUSED
APPROVAL WITHDRAWN
PRODUCTION DEFINITIVELY DISCONTINUED
of a vehicle type with regard to a type of RESS or component thereof pursuant to Regulation No. 92
Approval No ...................................................... Extension No ...................................................
1. Trade name or mark of the RESS ........................................................................................................
2. Type of the RESS .................................................................................................................................
3. Manufacturer's name and address .......................................................................................................
4. If applicable, name and address of manufacturer's representative
..............................................................................................................................................................
..............................................................................................................................................................
5. Brief description of the RESS (with/without ) fibrous materials, etc.
..............................................................................................................................................................
..............................................................................................................................................................
6. Trade name or mark of the motorcycle, moped or three-wheeled vehicle type(s) for which the
RESS is intended: ...............................................................................................................................
7. Vehicle type(s), starting with serial number: ........................................................................................
8. Type of engine : .................................................................................................................................
9. Cycle: two-stroke or four-stroke ...........................................................................................................
10. Cylinder capacity(ies) ...........................................................................................................................
11. Engine power(s) ...................................................................................................................................

ANNEX 2
EXAMPLE OF THE APPROVAL MARK
(See Paragraph 5.4. of this Regulation)
a = 8 mm min.
The above approval mark affixed to a component of silencing systems shows that the replacement
silencing system type concerned has been approved in the Netherlands (E4) pursuant to
Regulation No. 92 under approval No. 002439. The first two digits of the approval number indicate that
the approval was granted in accordance with the requirements of Regulation No. 92 in its original form.

4.1.1.2. 50% ± 10% of this conditioning cycle consists of town driving and the remainder of
long-distance runs at high speed; the continuous road cycle may be replaced by a
corresponding test-track programme.
4.1.1.3. The two speed modes must be alternated at least six times.
4.1.1.4. The complete test programme must include a minimum of 10 breaks of at least three hours'
duration in order to reproduce the effects of cooling and condensation.
4.1.2. Mopeds
4.1.2.1. The minimum distance to be covered during conditioning shall be 2,000 km.
4.1.2.2. 50% ± 10% of this conditioning cycle shall consist of town driving and the remainder of
long-distance runs; the continuous road cycle may be replaced by a corresponding test-track
programme.
4.1.2.3. The two speed regimes must be alternated at least six times.
4.1.2.4. The complete test programme must include a minimum of 10 breaks of at least three hours'
duration in order to reproduce the effects of cooling and condensation.
4.1.3. Three-wheeled Vehicles
4.1.3.1. Depending on the category of vehicle, the minimum distance to be completed during
conditioning shall be:
Category of vehicle according to
cylinder capacity (in cm )
1. ≤ 250
2. > 250 ≤ 500
3. > 500
DISTANCE
(km)
4 000
6 000
8 000
4.1.3.2. 50% ± 10% of this conditioning cycle shall consist of town driving and the remainder of
long-distance runs at high speed; the continuous road cycle may be replaced by a
corresponding test-track programme.
4.1.3.3. The two speed regimes must be alternated at least six times.
4.1.3.4. The complete test programme must include a minimum of 10 breaks of at least three hours'
duration in order to reproduce the effects of cooling and condensation.
4.2. Conditioning by Pulsation
4.2.1. The exhaust system or components thereof must be fitted to the motorcycle, moped or
three-wheeled vehicle or to the engine. In the former case, the motorcycle, moped or
three-wheeled vehicle must be mounted on a roller dynamometer. In the second case, the
engine must be mounted on a test bench.
The test apparatus, a detailed diagram of which is shown in Figure l, is fitted at the outlet of
the exhaust system. Any other apparatus providing equivalent results is acceptable.

4.3.1.1.3. Each test-bench cycle consists of six phases. The engine conditions for and the duration of
each phase are:
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
Engines of less
than 175 cm
(min.)
6
40
40
30
12
22
Duration of phase
Engines of not
less than 175 cm
(min.)
6
50
50
10
12
22
Total time 2.5 h 2.5 h
4.3.1.1.4. 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 motorcycle is
running at 110 km/h or 75% of S in top gear. The engine and/or motorcycle speeds are
determined to within ± 3%.
4.3.1.2. Mopeds
4.3.1.2.1. Conditioning consists of three test cycles.
4.3.1.2.2. Each test-bench cycle must be followed by a break of at least six hours' duration in order to
reproduce the effects of cooling and condensation.
4.3.1.2.3. Each test-bench cycle shall consist of six phases. The engine conditions for 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% of load at 100% of S
Total time
Duration of phase
(in minutes)
6
40
40
30
12
22
2 h. 30 min
4.3.1.2.4. 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%.

Figure 1
Test Apparatus for Conditioning by Pulsation
1. Inlet flange or sleeve for connection to the rear of the test exhaust system.
2. Hand-operated regulating valve.
3. Compensating reservoir with a maximum capacity of 40 l and a filling time of not less than one
second.
4. Pressure switch with an operating range of 0.05 to 2.5 bar.
5. Time delay switch.
6. Pulse counter.
7. Quick-acting valve, such as exhaust brake valve 60 mm in diameter, operated by a pneumatic
cylinder with an output of 120 N at 4 bar. The response time, both when opening and closing,
must not exceed 0.5 second.
8. Exhaust gas evacuation.
9. Flexible pipe.
10. Pressure gauge.
Exhaust Silencer Replacement Systems - Motorcycles.