TO:‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚  PRO-AM PRODUCTION NATIONAL CLASS COMPETITORS

FROM: ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚  ATVPG

DATE: ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚ ‚  March 18, 2009

SUBJECT: ‚ ‚ ‚ ‚ ‚ ‚  Sound Test Procedure for Pro-Am Production

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Machines entered in the Pro-Am Production division shall have mufflers / silencers which do not exceed 99db(A) measured at half maximum rpm per MIC manual SAE J1287 test at 0.5 meters (20 inches).

A grace period will be allowed for all machines to come into compliance.

By amateur round 4 (Sunset Ridge - Walnut IL.) all machines must meet the sound expectations before they are allowed to compete. Below is the RPM range for the ATV's in this classification

• Can Am DS 450 - 2,950
• Honda TRX 450 - 3,750
• Kawasaki KFX 450R - 3,750
• Suzuki LTR 450 - 3,750
• Yamaha YFZ 450 - 3,750
• Polaris 450 MXR - 4,250
• KTM 450 SX - 4,625
  

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