North Florida Regional RMax Challenge

General

Rules contained within this primer apply equally to all classes unless otherwise specified.

Data acquisition gauges must be mounted such that protrusion above the plane of the steering wheel is kept to a minimum; however specific control of this dimension per CIK Regulations is not applicable.

Scoring transponder location on back of the seat with the following requirements:

The bottom of the transponder body must be located no closer than 15cm from ground level.
The transponder may not be mounted forward of the tangent point defined by the radius transitioning to the side of the seat and the seat back.

Specific decals must be applied to the bodywork in the following locations:

Total of (2) MOJO Decals, one on the top or outside of each sidepod.
Total of (2) plain Champ Car decals, one on the top or outside surfaces of each sidepod.
Total of (2) plain ROTAX decals, one on the top or outside surfaces of each sidepod.
Total of (1) CCRKC decal, centered in immediate proximity of the junction between steering fairing and nose cone.

Engine

In conformance with latest revision release of Technical Regulations as released by ROTAX-BRP with the following exceptions and/or clarifications:

Silicone or like substance may be applied to the exhaust springs for vibration dampening only.

Spark plug NGK BR.EG of any heat range is acceptable for use.

All FR125 classes (not DD2) - regardless of available options, fuel pump must be mounted on the bottom location of the airbox bracket.

Chassis

Any sit-up, sprint kart chassis constructed in conventional manner of round, tubular steel is permitted. Chassis must conform to the dimensional specifications of the current CIK Technical Regulations in all respects with the following exceptions:

Rear axle wall thickness per CIK with the following exceptions: 40mm axle -- 2.2 minimum, 50mm axle -- 1.7mm.

Brake system homologation is NOT required for any class except for DD2. Functional front braking systems are prohibited in the MiniMax and Junior classes only. All braking systems must be operated simultaneously by a single foot pedal unless necessitated by physical handicap and approved by the event scrutineer.

It is recommended to use the CIK-prescribed method (ref: two bolts minimum of 6mm diameter minimum with secure fasteners) to attach ballast. It is permitted to use the national-standard single fastener method for ballast under seven pounds provided the fastener diameter is 8mm or greater and positive safety retention methods are used. Acceptable retention methods when using a single fastener are drilled bolts and threaded fasteners used in conjunction with safety wiring or cotter pins only. Neither double-nutting nor wire "wrapping" is considered acceptable in this case. Ballast weights over seven pounds must use two fasteners with appropriate security as described in the CIK Technical Regulations.

Bumpers and Nerf Bars

International, Masters and Junior Max classes only:

Front and rear bumpers and side nerf bars are required.

Functional quick fixation nose cone mounting is not mandatory and fabricated hard mounting of design consistent with industry standards is permissible.

When Velocity bodywork is utilized, standard Velocity side nerf bars and front bumper is mandatory.

Standard steel tubing rear bumpers must conform to CIK specifications with the exception that the height of top bar must be no lower than the top of the rear axle or higher than the plane passing through the tops of front and rear tires.

Homologated rear protection systems are optional for use but must be utilized as-homologated with no substitutions or alterations.

CIK02 and later bumpers and nerf bars are both acceptable for National Challenge.

Front and side bumpers must be utilized as a matched set and homologated from the CIK08 or CIK11periods only.

International, Masters and Junior Max classes only:

Bodywork shall be defined as a nose cone, steering fairing and two side pods or contoured panels, constructed of high-strength plastic only. All of the components are required. Bodywork must conform to the following specifications:

Must conform to specifications for CIK, Velocity-1 or Velocity-2 only. The only acceptable CIK bodywork will be from the CIK02, -08 or -11 homologation period. Mixing CIK02 with -08 or -11 bodywork is acceptable. Matched set' CIK08 or -11 bodywork is not required.

Cutting or otherwise altering of bodywork components shall be for chassis or component clearance only and is permissible on CIK02, -08 and -11 bodywork. Cutting of CIK08 and -11 bodywork is limited to right side pods for radiator clearance only.

Use of tape or similar material shall be limited to damage repair only. Covering the openings of the CIK02 side pods is permissible in wet race conditions only. Any use of tape or similar materials to provide a modified air flow over the chassis is strictly prohibited with the exception of rain shields for brake discs in wet conditions.

Specific side pod protrusion rule outboard of the quadrilateral formed by the four wheels is applicable. (Reference: CIK Technical Regulations, section 7.1.4, first paragraph)

DD2 class only:

Bodywork must be utilized as a matched set with front and side bumpers and homologated from the CIK08 or CIK11 period only.

No alteration of bodywork components is permissible.

Specific side pod protrusion rule outboard of the quadrilateral formed by the four wheels is not applicable. (Reference: CIK Technical Regulations, section 7.1.4, first paragraph)

Tires

(Note: Grand National requirements only) All classes except MiniMax, MOJO D1 (dry) 4.5x10-5 front, 7.10x11-5 rear and BridgestoneYJP (wet) 4.5x10-5 front, 6.0x11-5 rear.

(3) bead retention screws per CIK requirements in the outer wheel rims, front and rear, are mandatory for slick tires only for all classes except MiniMax. Bead locks are not required for wet tires in any class.

Maximum mounted front tire width is 140mm.

One set of tires (slick and wet) is allowed per event, plus one front and one rear spare (slick and wet).

Fuel and Oil

98-octane (anti-knock index) maximum, commercial, unleaded gasoline in 50:1 mixture with high quality synthetic two cycle oil.

For events where the fuel is not supplied as premix, the mixture ratio shall be verified by comparison with Digatron DT-15 or DT-47 to a controlled sample at 50:1. Competitors' fuel must measure within +10/-5 points to the controlled sample.

The official fuel and oil for the 2007 USRMC is VP Racing Fuels Motorsports 93 unleaded gasoline and Motul 800 2T Factory Line Off Road full synthetic two cycle oil.

Mini Max Class Specific Regulations

All regulations previously described apply equally to the MiniMax class unless specifically excepted in this section.

Original and unaltered MiniMax exhaust header, ROTAX P/N 273 972, is required, inside diameter 22 +/-0,2mm.

The following inlet restrictor is required: Unaltered USRMC inlet restrictor shown at this link http://www.rmaxchallenge.com/page.cfm?content=4&display=127 with inside diameter of 19+0/0,2mm.

Noise limit - per local limits or a maximum of 90dB (a) at 25 feet, measured perpendicular to the line of travel, engine under full load between 9,000rpm and 10,000rpm.

Wheelbase - 41 inches (1041.4mm) maximum.

The highest point at the center of the seat back shall be 12.0 inch minimum from ground level.

CIK axle wall thickness requirements are not applicable in MiniMax class.

Bumpers and bodywork, meeting industry standards must be employed at all times. For bodywork, CIK homologation is not required, but construction must be similar in form and consistent with the size of the chassis. Quick fixation mounting method for nose cone is not required.

Cadet nose cone may be of the full size design with maximum protrusion outboard of the front tires of 40mm per side.

(Note: Grand National requirements only) Tire sizes MOJO D1(dry) 4.5x10-5 front and rear, Bridgestone YJP (wet) 4.5x10-5 front and rear. Maximum mounted tire width is 145mm.

Wide rear bumpers covering both rear wheels are mandatory. Bumpers must cover at minimum the inboard half of each tire, but may not protrude outboard of the edge of either tire except in wet conditions. Bumper construction must conform to the following requirements:

o The rear bumper must consist of at least an upper and lower bar, both of 16mm minimum outside diameter.

o Height of the top of the upper bar shall be no lower than the top of the rear axle or higher than the plane passing through the top of the front and rear tires.

o Height of the top of the lower bar shall be 80 +/- 20mm from ground level.

o The entire unit must be attached to the chassis frame in a minimum of two points to the main frame tubes, flexible connection permitted.

o The upper and lower bars must be of continuous loop profile with a minimum bar diameter of 16mm in all places except between the chassis rails. Area between the chassis rails must also be protected by a bar of 16mm minimum outside diameter but it is not required to be part of the continuous loop. A minimum of 80 percent of the opening between chassis rails must be protected if accomplished with a secondary loop extending downward from the top bar.

o The upper and lower bars must be - in general terms - inline and parallel to one another and connected on the outboard ends by a full radius bend of sufficient dimension to prevent injury.

o Any possible adjustability of the bumper must not incorporate or expose sharp edges, protruding fasteners or other elements that present any danger of puncture-type injury.

o Final acceptance of any bumper's acceptability with regards to safety lies with the event scrutineer.

In an effort to encourage progressive designs in this arena, the CCRKC and its designees reserve the right to evaluate for acceptance any rear bumper design presented. In this light, bumpers not meeting these exact criteria but satisfying the intent of application can be considered for acceptance with pre-event submission of design and specifications to the local scrutineers. Competitors/suppliers desiring evaluation of a non-conforming design are urged to consult local and/or national technical departments well in advance of the event in question. Commercial designs approved by the national technical department will be listed and posted on the website.

Each member will receive a complete rule book in their membership packets with planned shipments of membership packets to begin the first part of February. Any member who sent in an application and has not received a confirming e-mail should contact Marshall Martin by e-mail only. If you do not have an e-mail address you will not receive any confirmation, but will receive your membership packet when shipments begin.

Technical Rules
The technical rules in effect for the series are the US National Rules Sprint Primer, the ROTAX Max Challenge Technical Regulations, current version as published by ROTAX-Bombardier and the CIK-FIA Technical Regulation as published by the Commission Internationale de Karting. The hierarchy is as listed, when in conflict, the US National Primer supercedes the ROTAX Tech Spec and the ROTAX Tech Spec supercedes the CIK rules. These documents are available online at the following locations:

RMax Challenge Rules Primer - www.rmaxchallenge.com

ROTAX Technical & Sporting Regulations - www.maxchallenge-rotax.com

CIK Technical Regulation - www.cikfia.com