Document ID: chunk:federal_register_of_legislation:F2021C00509:reg:6:p1
Version: federal_register_of_legislation:F2021C00509
Segment Type: reg
Provision Reference: reg 6 (pt 1/10)
Character Range: 199843–203235

6      25% load at 100% of S   22
       Total time              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 silencing systems shall be marked with clearly legible and indelible make and type references.
          5.2.3.                                   Any packaging of original replacements for exhaust or silencing systems shall be marked legibly with the words "original part" and the make and type reference integrated together with the "E" mark and also the reference of the country of origin.

          5.3.                                         Intake silencers

          If the engine intake has to be fitted with an air filter and/or intake silencer in order to comply with the permissible sound level, the filter and/or silencer shall be regarded as part of the silencer and the requirements of paragraphs 5.1. and 5.2. shall also be applicable to them.

Annex 3 – Appendix

MEASURING POSITIONS FOR MOPEDS IN MOTION

Fig. 1
MEASURING POSITIONS FOR STATIONARY MOPEDS

Fig. 2

TEST APPARATUS FOR CONDITIONING BY PULSATION
Figure 3

          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 liters 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 seconds.

          8.                                               Exhaust gas evacuation.

          9.                                               Flexible pipe.

          10.                                           Pressure gauge.

Annex 4

MAXIMUM SOUND LEVEL LIMITS (NEW MOPEDS)

Category of two-wheeled mopeds   Maximum noise-level values in
                                 dB (A)
< 25 km/h                        66
>25 km/h                         71

Annex 5

SPECIFICATIONS FOR THE TEST SITE

l. Introduction

          This annex describes the specifications relating to the physical characteristics and the laying of the test track. These specifications, based on a special standard,[29] describe the required physical characteristics as well as the test methods for these characteristics.

2. Required characteristics of the surface

          A surface is considered to conform to this standard provided that the texture and voids content or sound absorption coefficient have