MOTO-X »

FIM cuts Motocross, Enduro decibel limit.

"...an average reduction between 3 and 6 dB/A, compared to the current situation..."
The noise emitted by off-road machines, which has increased dramatically in the four-stroke era - prompting a backlash from the public and resulting in the loss of many off-road facilities - could finally be nearing a solution.

Like an alcoholic told by doctors about the damage drink is doing to him, but who keeps going to the bar, the manufacturers have produced machines with unnecessary levels of noise - especially for amateur racing - year after year. But since these motorcycles have been built to rules set by the main racing organisations, led by the FIM, blame is shared by all parties.

Decibel limits have steadily been reduced, but with the old method of noise measurement producing inconsistent 'real world' results - and widely open to abuse - little progress has been made on the biggest issue (along with rising machine costs) facing modern off-road motorcycling.

Two years ago, unable to ignore the growing call for action on the subject, the FIM announced an initiative to reduce the sound levels of off-road motorcycles.

With the support of manufacturers and promoters, a new sound test method called "2 metre max" was devised and extensively tested.

This new sound test is carried out with a sound meter positioned at the rear of the motorcycle, at a distance of two metres and an angle of 45° from the silencer. The engine is tested at maximum rpm.

In what is being labelled as a turning point in the war against destructive noise, the "2 metre max" rule will now come into effect for the 2010 FIM Motocross, Enduro and Track Racing World Championships.

The FIM states that the 'noise levels permitted will be an important first step in the reduction of sound levels, with an average reduction between 3 and 6 dB/A, compared to the current situation, depending on the discipline.'

For Motocross and Track Racing, the maximum noise level admitted at a distance of 100 metres will be of 81 dB/A, and in Enduro the maximum noise level admitted at a distance of 100 metres will be 78 dB/A.

"A major step has been made with the implementation of this new method, thanks to an excellent cooperation between manufacturers and promoters, not to mention the strong impulse given by the Danish federation,” said Jean-Pierre Mougin, FIM deputy president and chairman of the Committee for the reduction of sound levels.

"This is important for the survival of all FIM off-road disciplines. The FIM had to react effectively. 2010 will constitute a first step in the fight against noise nuisances and the results will define the future actions."


Tagged as: noise

Related Pictures

Click on relevant pic to enlarge
The ‘2 metre Max’ sound measurement method.
Motocross bike being ridden along a mountain ridge
Toyota and Joe Gibbs built this motocross concept bike (pic: Toyota).
Toyota and Joe Gibbs Racing built this concept motocross bike (pic: Toyota).
Toyota and Joe Gibbs Racing built this concept motocross bike (pic: Toyota).
Toyota and Joe Gibbs Racing built this concept motocross bike (pic: Toyota).
The factory Yamaha motocross team will use Ohlins suspension in 2010.
The 2009 FIM Motocross World Championship Official DVD Review by Duke
Team USA takes 20th Motocross of Nations win.
David Bailey at the 1986 Motocross of Nations.
The 2009 Motocross of Nations track at Franciacorta, Italy takes shape.
The Mallory Park British Motocross Grand Prix track
Ryan Villopoto - Kawasaki (Pic: allisports.com)
Chad Reed - Suzuki.
The 2008 Motocross, Supermoto and Freestyle FIM champions receive their awards.
Women’s world motocross championship rider Katherine Prumm (pic: Yamaha).
Team USA wins the 2008 Motocross of Nations at Donington Park.
The 2008 Motocross of Nations circuit at Donington park.

Join the conversation - Add your comment

Please login or register before adding your comments.

Although the administrators and moderators of this website will attempt to keep all objectionable comments off these pages, it is impossible for us to review all messages. All messages express the views of the poster, and neither Crash Media Group nor Crash.Net will be held responsible for the content of any message. We do not vouch for or warrant the accuracy, completeness or usefulness of any message, and are not responsible for the contents of any message. If you find a message objectionable, please contact us and inform us of the problem or use the [report] function next to the offending post. Any message that does not conform with the policy of this service can be edited or removed with immediate effect.


Old School - Unregistered

November 30, 2009 4:23 PM

Guys, the only way forward with this is to say that ALL bikes, new or old should comply with NEW laws. It's no use saying there's a cost involved. By the time that all old noise level bikes have disappeared, so will all of the circuits. Racing isn't cheap, but riders have to buys tires, fuel etc not to mention new flash kit. New silencers have to be priority - but it won't happen.

Old School - Unregistered

November 30, 2009 9:41 AM

This measure is 30 years too late. All the tracks that we've lost will never be recovered. The main problem is that most riders don't think quiet bikes are necessary. In 10 years time all the irresonsible noisy riders who mod their bikes after tech inspection will have super trick noisy weapons and aboslutely no tracks whatsoever! When you have :? Europe wide governments, who in the main hate bikes, why shout up louder to tell them your there? This applies to road, off road and road racing.



© 1999 - 2014 Crash Media Group

The total or partial reproduction of text, photographs or illustrations is not permitted in any form.