Construction and Use Law (Different to MoT requirement BTW)

(d) Exhausts - on motorcycles first used on or after 1 January 1985 the silencer which forms part of the exhaust system must be either:

(i) that with which the machine was first fitted; or

(ii) clearly and indelibly marked with :-

-the relevant BS marking BS AU 193/T2, BS AU 193a, 1990/T2, BS AU 193a, 1990/T3; or

-the relevant "e" marking to show compliance with EC Directive 89/235; or the relevant "e" marking to show compliance with Chapter 9 of EC Directive 97/24; or

-the name or trade mark of the manufacturer or marked with that manufacturer's part number - relating to it.

The European Community noise limits applicable to new motorcycles first used from 1 April 1991 are:

Motorcycle Category by cm3
Limits in dB(A)

Up to and including 80
77

Between 80 and 175 (incl.)
79

Above 175
82

Motorcycles approved to EU Directive 97/24/EC, Chapter 9 will be 2dB(A) less than the above figures.

(Note: the precise regulations for motorcycle exhausts are complex and it is recommended that they are studied closely to obtain accurate and complete details of the requirements).

Before buying any replacement parts for systems listed in this section, riders should check for the relevant marks, where applicable. These will include an "e" mark for EC Directives, an "E" mark for ECE Regulations and "BS" for British Standards.

(Note: amateur motorcycle builders may be exempt from some or all of the requirements)

[spacemonkey]

Fine, but how do they measure the noise? is it at tickover, or a 3000rpm flyby? is it at the end of the pipe or 1 m? Anyone know?


ps, Maplins do a sound meter for £39.

[Paranoid Dave]

Originally Posted by spacemonkey

ps, Maplins do a sound meter for £39.

and for an extra tenner, Ted Bovis will test it for you :lol:

[spacemonkey]

Hey, it has recently found that (and what a surprise this was) that the Everest claims were bull****. Hasn't he demised by now?

Originally Posted by spacemonkey

Fine, but how do they measure the noise? is it at tickover, or a 3000rpm flyby? is it at the end of the pipe or 1 m? Anyone know?


ps, Maplins do a sound meter for £39.

There are specific requirements laid down in the EC Directive covering motorcycle noise. The test itself is a dynamic test known as drive by. The test is conducted on a special approved surface as described in the directive, due to the cost of this there are very few in the UK. The approach speed is 50km/h in specified gears followed by full throttle application. The acceptable noise level depends on engine size but generally lies between 75 and 80 dB.!

2.1.3.1. Condition of the motorcycle
During the measurements the motorcycle must be in running order (including coolant, oils, fuel, tools, spare wheel and rider).

I can post the whole of Chapter 9 if you like, but it is very long...

[bigredduke]

Originally Posted by Funnymachine

(d) Exhausts - on motorcycles first used on or after 1 January 1985 the silencer which forms part of the exhaust system must be either:

(i) that with which the machine was first fitted; or

(ii) clearly and indelibly marked with :-

-the relevant BS marking BS AU 193/T2, BS AU 193a, 1990/T2, BS AU 193a, 1990/T3; or

-the relevant "e" marking to show compliance with EC Directive 89/235; or the relevant "e" marking to show compliance with Chapter 9 of EC Directive 97/24; or

-the name or trade mark of the manufacturer or marked with that manufacturer's part number - relating to it.

The European Community noise limits applicable to new motorcycles first used from 1 April 1991 are:

Motorcycle Category by cm3
Limits in dB(A)

Up to and including 80
77

Between 80 and 175 (incl.)
79

Above 175
82

Motorcycles approved to EU Directive 97/24/EC, Chapter 9 will be 2dB(A) less than the above figures.

(Note: the precise regulations for motorcycle exhausts are complex and it is recommended that they are studied closely to obtain accurate and complete details of the requirements).

Before buying any replacement parts for systems listed in this section, riders should check for the relevant marks, where applicable. These will include an "e" mark for EC Directives, an "E" mark for ECE Regulations and "BS" for British Standards.

(Note: amateur motorcycle builders may be exempt from some or all of the requirements)

so what exactly constitutes an amateur motorcycle builder and what requirements might they be exempt from? is it someone like GT or PD or most of us who have modded their bikes in some way? Also - what if you have made up your own cans from components that are readily available?

Originally Posted by Funnymachine

2.1.3.1. Condition of the motorcycle
During the measurements the motorcycle must be in running order (including coolant, oils, fuel, tools, spare wheel and rider).

Spare wheel

[bigredduke]

Originally Posted by MilesB

Spare wheel

Perhaps it refers to the one around my middle? not known as bigfatduke for nothing tha' knows (thanks Mand)

Don't you just love British bureaucracy...

arse.

xxx