Mini Modified Tractors

Class purse $1500.00 including their sled.

Weight not to exceed 2200lbs

1.        All Mini Modified Tractors must have working brakes on both rear wheels.

2.        No portion of the Mini Modified Tractor shall exceed eight feet forward of the centerline of the real axle and not to exceed six feet in width.

3.        Tire size is 18.4” x 16.1” only.  No radials allowed.

4.        Automatic transmission vehicle must have a reverse lockout.  S.F.I. approved transmission shield is mandatory.

5.        All standard transmission equipped super rods must have a S.F.I.  equipped clutch and flywheel and steel bell housing complete with 1/8” block plate and a 90 thou thick liner.  All clutches to be inspected annually.

6.        All Mini Modified Tractors must have a switch that will allow starting in neutral or park only.

7.        Fenders on all Mini Modified Tractors must be constructed so that no part of the driver’s body can come into contact with rear tires.

8.        Minimum drawbar length is 6” from the center of rear axle to the point of hook. 

9.        Maximum height of drawbar is 13” from top of the hitching device to ground.

10.     The hole size in drawbar must be a minimum of 1 ½” diameter and minimum thickness of 7/8” cross section.

11.     A draw bar cable is mandatory.

12.     All Mini Modified Tractors must have a roll cage of at least four point attachments to the frame.  Minimum cage tube to be 1” diameter.  Cage may be welded or bolted on with a minimum of four 1/2:” grade eight bolts.  Roll cage must protect upper body of the driver.

13.     Steering rotation must be a minimum of 2 ½ turns from stop to stop.

14.     All seats must be securely fastened.

15.     Weights must be securely fastened on brackets and not extend rearward beyond the rear tires.  Weights must not obscure hitching procedure.

16.     All Mini Modified Tractors must have two turn over bars that must support the vehicle and be at least 3 x3” and be no less than 5” beyond rear most point of the tire and no more than five inches above the ground.  No Wheels.

17.     All drive shafts and yokes to be completely shielded 360 degrees the full length of shaft and be a minimum thickness of ¼” metal and securely mounted with grade eight bolts.

18.     Wheel studs to extend through wheel nuts on rear wheels.

19.     Maximum engine size is 500 cubic inches.  8 cylinder engines only.

20.     All engines to be naturally aspirated, wedge head and cast iron block.

21.     No electronic fuel injection allowed.  Gasoline or alcohol engine only, no diesel designed engines allowed.

22.     Electric fuel pumps are allowed but must be wired to a kill switch.

23.     No mechanical driven fans allowed.

24.     All engine exhausts must exit upwards and be a minimum of 12” above the bend in the pipes and no more than 10 degrees from vertical.

25.     S.F.I. approved balancer mandatory.  The complete diameter of the balancer must be shielded with a minimum of ¼” metal.  The shield must be held in position with a minimum of two grade eight bolts.  All balancers must be bolted to crankshaft.

26.     Stock valve cover bolt pattern cylinder heads only.

27.     Four point seatbelts mandatory and must be properly attached during pull.

28.     Fire suit of minimum one layer and neck-brace is mandatory.

29.     D.O.T. approved helmet, full faced with shield, balaclava and S.F.I. gloves mandatory.

30.     Leather boots or S.F.I. approved boots required.

31.     Fire extinguisher mounted on vehicle must be compatible with fuel used.

32.     Engine outside shielding must extend from the base of the cylinder head to 2” below crankshaft centerline.  Must be a least 1/8” metal and the full length of the block.  Frame allowed as shield.

33.     Throttles to be a positive two dead man type.  All foot throttles must have a toe strap.

34.     Mini Modified Tractors must have an automatic-type white light on the dashboard and one within 6” of the kill switch to indicate when the vehicle is in the reverse position.

35.     All Mini Modified Tractors must have an emergency kill switch that will kill the engine in the event of breakage.  With a ring on the switch, no less than 2” in diameter located at the rear of the vehicle.

36.     Battery disconnect switch required.

37.     S.F.I. flex-plate required in automatic transmission vehicles.

38.     All Mini Modified Tractors participating in a Great Lakes event will follow both the general and safety rules as outlined in the Great Lakes Rule Book.