Junior Champ 

1.  Main frame members shall be constructed of cold rolled, electric weld, round steel tubing or other material of equal or greater strength of 1.125 inch nominal minimum diameter, .060 inch wall thickness. Conventional tubular space frame construction methods only are allowed. Non-conventional construction techniques must receive review and approval of the race director and/or tech inspector prior to competition.

 

2.  Wheelbase: 40.0 inches minimum, 43.0 inches maximum. Wheelbase is measured on true axle centerline, each side.

 

3.  Overall width: 38.0 inches minimum, 50.0 inches maximum. Overall width shall be measured from outside tire sidewall to opposite outside tire sidewall.

 

4.  Overall length: 80.0 inches maximum. Overall length is measured at any cross section of the kart, parallel to the longitudinal centerline.

 

5.  Roll cage specific specifications:

     a.  Full roll cage of four point conventional construction is mandatory. The four uprights and top horizontal connecting tubes must be constructed of 1.125 inch nominal minimum diameter mild steel tubing at .083 minimum thickness. All attachments by welding unless otherwise specified.

     b.  Uprights and positioning: Each of the rear uprights must be welded to the main frame rails at a point aft of the rear axle centerline. Each of the front uprights must be welded to the side frame rails at a point forward of the steering wheel mount point and aft of the leading edge of the front tire. All uprights must create an angle of no less than 45 degrees with the main frame rails and have no bends within three inches of attachment point except for left rear.

     c.  Top hoop rails: Corner construction shall be of rounded type with no sharp edges or corners allowed.

     d.  Shoulder harness mounting bar shall be welded laterally between rear uprights, double braced to the top lateral bar, at a height suitable for harness mounting. A minimum 6.0 inch square headrest shall be mounted to the braces level with the driver’s head.

     e.  Side protection bars are mandatory and must run horizontally between front and rear uprights each side. One end connection may be slip jointed. Side protection bars must be positioned vertically between the driver’s shoulder and elbow.

     f.  Roll cage overall width: 16.0 inches minimum. Width to be measured outside to outside between any two uprights.

     g.  Roll cage overall height: 30.0 inches minimum. Height to be measured vertically from highest lateral cross bar centerline to main frame rail centerline.

     h. All roll cages that deviate in any way from the above description must be brought into conformance or receive approval from the race director or tech inspector prior to be used in competition.

 

6.  Front bumper: All components shall be constructed of round steel tubing of .750 inch nominal diameter minimum. Front bumper must encircle entire front nose area at a height of 7.75 inches minimum from ground level. Double bumpers are recommended.

 

7.  Rear bumper: All components shall be constructed of round steel tubing of .750 inch nominal diameter minimum. Double bar construction is mandatory. Rear bumper must encircle the tail section of the kart. The top of at least one bar must be 7.50 inches maximum from ground level.

 

8.  Nerf bars: All components shall be constructed of round steel tubing of .750 inch nominal diameter minimum. Double bar construction is mandatory. The top of the upper bar must be no higher than the top of the rear tire. The bottom of the lower bar must be no lower than the bottom of the main frame rails. Nerf bar must extend from an area inside a longitudinal line from the outer portion of the front tire to a point no further outboard than 1.0 inch from outer tire surfaces.

 

9.  Seat positioning: No part of the seat may be positioned closer than six inches inside the left hand nerf bar. Seat height is 11” minimum. Note: Measurement is a vertical plane from ground to highest point on the seat.

 

10.  Harness: Five point, SFI-rated racing harness is mandatory. Metal to metal harness fastener is mandatory. Mounting bolts must be cotter keyed and attached to a 3/16 inch minimum thick, 2.0 inch minimum square steel mounting plate that is welded to the frame and/or roll cage.

 

11.  Arm Restraints: Arm restraints, attached to the steering column or harness, are mandatory.

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12.  Body work: Must have a champ style nose and side panels. Fiberglass and/or plastic only. No enclosing the front tires. Driver eye level must be above the top of the nose.