From a press release issued by AMA Pro Racing:

AMA Pro Racing Refines Sound Testing at Motocross

PICKERINGTON, Ohio (July 2, 2004) — The following Technical Bulletin was distributed to all AMA Chevrolet Motocross Championship credential holders on Friday, July 2.

According to series manager Steve Whitelock, the plan is designed to ensure that all competitors are in compliance for sound and allows for a “phasing in” of tighter testing procedures.

“The 102dB/A limit is already in the AMA Motocross Rulebook,” said Whitelock. “This multi-step compliance procedure simply allows competitors a reasonable time frame to ensure they are within the existing guidelines. With so many four-stroke motorcycles comprising the field now it’s clear we have to take steps to ensure everyone’s following the sound rules.”

TO: All Licensed Motocross/Supercross Riders and Season Credential Holders

FROM: Rob King, Technical Manager

DATE: July 2, 2004

SUBJECT: Sound

AMA Pro Racing has been conducting sound tests at selected rounds of the 2004 AMA Motocross Championship. Effective immediately, we will begin implementing new measures to ensure all competitors are in compliance with existing sound rules.

In order to provide everyone with a reasonable time frame to understand the testing methodology and to ensure that all motorcycles are in compliance, the following will be implemented:

1. At Round Six (Unadilla, July 17, 18) we will be conducting sound tests randomly throughout the race weekend. Sound levels will be recorded and any competitor exceeding the 102dB/A sound level will be issued a warning.

2. Beginning at Round Seven (Kenworthy’s, July 24, 25) and at subsequent rounds, we will continue to conduct sound tests randomly throughout race weekends. If, during pre-race tech inspection, a motorcycle is not in compliance for sound, that competitor will be required to bring his/her motorcycle into compliance to pass tech. If a motorcycle is not tested for sound during tech inspection but fails a sound test administered at any other time throughout the race weekend, that competitor may be required to bring his/her motorcycle into compliance before returning to competition.

3. AMA Pro Racing technical staff will be available throughout race weekends so competitors can voluntarily submit their motorcycles for sound testing.

4. AMA Pro Racing will follow SAE J1287 guidelines. AMA Pro Racing will be the sole determining factor on whether or not motorcycles are in compliance for sound.

It is our intention to make it as easy as possible for competitors to determine the sound levels of their motorcycles and bring them into compliance as necessary. It is in the best interest of our sport to ensure that everyone is proactively observing existing sound rules and we expect full cooperation.

Should you have any questions concerning this information, please contact Technical Manager Rob King at (614) 856-1910, extension 1230 or [email protected].