Pure Stock Class Rules

Pure Stock

Wanna give pulling a try, this class is open for youngsters age 5 - 19. This is a great low budget or starter class. Tractors are completely stock. Remove your mower deck, install wheelie bars and weight racks and you are ready to pull!!

**** It is recommended that pure stock tractors have an adjustable hitch, but it is not required. It makes hooking easier and competition more equal.


    Limited to 1100 lbs and 1200 lbs hooks at ALL CMQSTP events. 


Pure Stock

1. Motor limited to opposed flathead twin MAX 18hp, flathead single MAX 16hp, overhead valve single MAX 16hp. Motor must remain stock. NO motor modifications allowed. NO overhead valve V-Twins. The motor must have come in that model and year of your tractor and be equivalent to or smaller than the original motor.

2. 30 thousandths over stock bore and 30 thousandths milling of head surface for flatness.

3. 4000 RPM limit

4. Tractor must remain stock for make and model.

5. No relocating of components.

6. You are allowed to have either a foot or hand throttle.

7. Engine must have lawnmower type muffler.

8. Tractor must have stock rear end and transmission. Tractor must have stock pulleys and stock gearing.

9. Stock shielding is required. 

10. No portion of any tractor may exceed 6 feet in width. No more than 2 inches wider than tire at any time, including weights.

11. Tractor may not be longer than 5 ½ feet from the center of the rear axle to the front most point including any weights.

12. For tractors that come with an electric fuel pump, you must be able to verify that the tractor came stock with the electric fuel pump. 

13. All tractors with an electric fuel pump MUST HAVE a kill switch that kills the fuel pump and ignition. The kill switch will be located within 6 inches of either side of center back of tractor with a minimum of a 1½ inch loop for hooking.

14. Turf tires only. No cutting. Tires not allowed to exceed 23x10.5x12. Except for tractors that came through with large tires. E.g. Case, Ingersoll, Power King, etc. 

15. No modifications of rims allowed. No ground or welded rims.

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