NATVA 6x6 Rules

Here is a copy of the National All Terrain Vehicle Association NATVA Rule Book from 1975.


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Here is the official souvenir program for the National All Terrain Vehicle Association's 1972 Grand Nationals. The Grand Nationals were held on June 2, 3, and 4 at the county fairgrounds in Monroe Michigan.

(click on thumbnails to enlarge)


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Here is a list of the official results of the 1972 Grand Nationals:
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Here you will find literature relating to the National All Terrain Vehicle Association (NATVA). From old souvenir programs to the official rules for NATVA sanctioned races, all of the literature in this section was again submitted by the members of this site.

Here is a list of the NATVA rule changes that went into effect on July 1, 1972 along with the ballet for members to vote on.

(Click on thumbnails to enlarge)

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Here are some templates for making your own three lug to five lug (3 on 2" to 5 on 4.5") adapter.
Save some cash and show off your metal working skills

These are in PDF format so you will need adobe reader to view these. If you don't have it you can download it for free at Adobe

Here is the template that you use for a blueprint. It is to scale as long as you print it on an 8.5" x 11" piece of paper. (normal sized paper):
Three Lug to Five Lug Template H...

Due to the popularity of the three lug to five lug template, here are two templates for making your own three lug to four lug adapters. Be sure to download the correct one. One is a 3 on 2" to 4 on 100mm pattern and the other is a 3 on 2" to 4 on 4" pattern.

They are in PDF format so you will need adobe reader to view them. If you don't have it you can download it for free at Adobe Be sure to print the template out full scale on an 8.5" x 11" piece of paper. Then double check the m...

Salsbury Torque Converter shop manual second edition from the Salsbury Corporation out of Los Angeles, CA. This manual details the different kinds of Salsbury clutches along with instructions on how to disassemble / reassemble them. It also details how to tell when components are worn and what a properly adjusted belt should look like between two torque converters.

A color brochure on the Salsbury automatic torque converter that explains how the clut...

Here is a 4 page article on the Mikuni VM series slide valve carburetor and how to tune it including some detailed carb jet information.

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Here are a couple of helpful articles for the JLO engines:
(Click on the thumbnails to view the full sized image)

JLO Twin Cylinder timing procedures for models LR-340/2 (2F-340-1), LR-399/2 (2F-400-1) and LR-440/2 (2F-440-2)




Here are some wiring diagrams for the JLO engines. There are three different ones. The engine model numbers that they apply to are listed in the bottom right corner.

A complete JLO Service Manual: ...