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NOHVCC, as a national body of OHV recreation enthusiasts, develops and provides a wide spectrum of programs, materials and information, or "tools", to individuals, clubs, associations and agencies in order to further a positive future for responsible OHV recreation.
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Montana On the Right Trail Survey
 
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NOHVCC SOUND RESOURCES PAGE
 

The Sound Advice document
Sound Advice is the product of a two-year effort by the Motorcycle Sound Working Group, which was formed in 2003, and included representatives of the street and off-road riding communities, as well as motorcycle manufacturers, aftermarket companies, event organizers, and representatives from law enforcement, municipal government, research institutions and regulatory agencies.
The document was released following the second National Summit on Motorcycle Sound.
Click here to view Sound Advice (.pdf).

Information on purchasing sound testing equipment
To perform sound testing in the field you will need a tachometer, sound meter, and RPM data sheets. The tachometer that most folks use is a vibrating reed tachometer available for about $25. The actual brand of the tach is Treysit but it is sold by both Briggs and Stratton and Tecumseh for testing small engines. You may be able to order them through small engine repair shops. The NOHVCC has ordered them from www.machovec.com Here's a direct link to the tachometer on their site; http://www.machovec.com/quest/vibratach.htm This is probably the easiest source to buy from.
As for sound meters, we've found that the cheap units from companies like Radio Shack are very inaccurate and not worth the effort or expense. For a more high-quality unit, we've been happy with the Quest sound meters. Machovec also provides Quest sound meter and tachometer packages for a competitive cost. If you are looking for a good quality meter to use for educational purposes check out the Intercomp sound meter at: Intercomp Sound meter page
You can get RPM data sheets from the MIC Sound Manual (see below) and from
the Motorcycle Industry Council downloads page  for the latest updates.

Sound testing data
California State Site
Oregon Site

Sound test training
Link to MotorcycleNoise.com (DPS Inc.) which contains information on sound test training and many other sound resources.

Quiet your ride and add free horsepower!
Step-by-Step Muffler Repacking Tips from ATV Rider Magazine

Sound levels for AMA racing
2007 level is 99 dB(a) with lower levels in coming years

MOTORCYCLE INDUSTRY COUNCIL STATIONARY SOUND TEST MANUAL
E-mail or call us  for a free copy
The Motorcycle Industry Council provides this manual for those interested in the effective and economical enforcement and evaluation of off-highway motorcycles and ATVs in the field. The manual details the entire procedure for implementing the SAE J1287 sound test which is used by most land management agencies throughout the country. The manual also contains sound data and RPM testing levels for a wide variety of off-highway motorcycle and ATV models and years. This list is updated quite frequently with inserts or you can go to the Motorcycle Industry Council downloads page  for the latest updates.
E-mail us at trailhead@nohvcc.org or call (800)348-6487 to obtain a copy.

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Help the next generation of OHV riders get started on the right track.
Club Start-Up Kits: Everything you need to know about starting and running a successful OHV riding club.
Management Guidelines for OHV Recreation: Time-proven strategies for the building and maintenance of environmentally sustainable and quality OHV trail systems. Now available in PDF!
Park Guidelines for OHVs: A resource guide to assist in the planning, development, enhancement and operation of OHV recreation facilities.
Instructional GPS Trail Mapping DVD: How to map trails for the USFS OHV Route Designation process and other applications.
Stationary Sound Test Manual: A detailed how-to guide with RPM settings for various models- follows the SAE J1287 procedure.

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©2007 National Off-Highway Vehicle Conservation Council, Inc.
427 Central Ave. West, Great Falls, MT 59404
Ph: 800-348-6487 • Fx: 406-454-9142 • trailhead@nohvcc.org
The NOHVCC is a 501(c)(3) Not-For-Profit Foundation