Rules

Mid-Michigan Mini Tractor Pulling Association Rules

by MMMTPA
Updated: January 18, 2024
11 min read

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General Rules
1. No alcoholic beverages. Any drivers drinking alcoholic beverages before or during a pulling event will not be allowed to pull at that event.
2. If any puller or spectator causes problems at a pulling event they will be asked to leave and will not be allowed to return.
3. The weight limit listed for each class includes the weight of the driver
4. You cannot pull in a class if you cannot make the weight limit
5. All machines will pull one time (no two drivers for the same machine) with the exception of the beginner class
6. All drivers are to be at the pull site with their machine(s) at least one hour before event is scheduled to start
7. All drivers are to attend a drivers meeting before each pulling event
8. Each driver must sign and date insurance waiver before the start of the pull. Parent must sign waiver for any driver under the age of 18.
9. Any and all disagreements will be settled after the pulling event is over
10. Age Limits
  1. Beginner Garden Tractor Class: no one younger than 4 years old or older than 10 years old. Maximum of 4 years in the beginner class.
  2. Garden Tractor Classes: no one younger than 8 years old
  3. Modified Garden Tractor Classes: no one younger than 12 years old. Must have one-year experience a Garden Tractor Class.
  4. Single-engine Ultra-lite Classes
    1. Must have at least one-year experience in any Garden Tractor Class.
    2. Up to 250cc: no one younger than 8 years old or older than 17 years old.
    3. Over 250cc: no one younger than 14 years old.
  5. Multi-engine Ultra-lite and v8 Classes: no one younger than 18 years old. If 16 or 17 years old, the parent must be present at each pull with the driver. The parent must also sign a waiver at each pulling event before the driver can pull.
Track Rules
1. All machines will cross the scales and be inspected while lined up (your hitch height will be checked at this time also)
2. All drivers must be with their machine and in the staging area when it's time for your class to pull or your machine will be removed from the line up and you will not be allowed to pull
3. Any driver and machine is subject to being weighted and tech’ed immediately following their pull
4. There is to be no hot rodding or reckless driving with your machine on or off the track
5. Only one pull per driver unless you are the first puller. Then you have the option to turn down your first pull and come back in third or last position.
6. Each driver will get one restart if the sled is stopped before the 50' line; except in a pull-off.
7. Each driver will get one hook in a pull-off; driver cannot stop before the 50' line for a restart in a pull-off.
8. If anything breaks on your machine, you can drop to last position; then you will have two minutes after the last puller in the class.
9. If any part of your machine touches or goes over the boundary lines, it will result in a disqualification
10. If anything falls off your machine (including but not limited to weights) while pulling, it will result in a disqualification
11. The driver is to look forward at all times when pulling (no looking down or backwards)
12. The driver must stay seated on or in their machine at all times while pulling
13. The driver must have atleast one hand holding on to the steering wheel at all times
14. There is to be nobody running down the side of the track when a machine is pulling
15. The flag people and the sled operator have the final decision during the pull
Tech, Safety & Equipment
1. All machines must meet the safety rules after the first pull
2. All tractors or machines are to be built to what the rules say, not to what they don't say
3. The driver must be in control of his or her machine at all times on and off the track
4. All drivers must wear a helmet, long pants, goggles or safety glasses, and leather boots or SFI approved fire shoes (no tennis shoes)
5. SFI-approved fire suits and gloves are mandatory on all modified garden, ultra-lite and v8 tractors
6. Fire extinguishers are mandatory on modified garden tractor, ultra-lite and v8 tractors
7. All starter or pit carts must have cover over battery and exposed terminals
8. All tractors are required to have a switch to kill the engine and fuel pump (if used) mounted within 6" of either side of center back of tractor with a minimum 1-1/4" ring to easily connect to the sled
9. All machines must have stationary wheelie bars, operating brakes, and rear fenders
10. All wheelie bars must hold the weight of the tractor and driver
11. Hitch and wheelie bars cannot be connected
12. No ball hitches
13. Weights must be securely fastened to your machine
14. Weights cannot interfere with your handling of your tractor or your safety as the driver. Can not interfere with hitch or hooking of tractor.
15. 2-wheel drive tractors only; no 4-wheel drive tractors.
16. All machines must have single rear wheels; no dual wheels.
17. Tricycle front ends only allowed in Garden Tractor classes
18. There is to be no tire chains or studs in your tires in any class
19. No nitrous allowed in any class
20. Turbos are not allowed in any class; except otherwise stated in class rules and must have a 3/8" bolt thru exhaust tube.
Garden Tractors
1. Must meet or exceed all Safety & Equipment (Section 3)
2. Rearend
  1. Must be a standard factory equipped tractor with a transaxle
  2. Welded rear ends and positive traction rear ends are allowed
3. Hitch
  1. Must have a solid hitch with a 1 1/4" opening
  2. Max hitch length: can be no more than 18" in back from centerline of the rear axle
  3. Max hitch height: 13"
4. Weights
  1. Cannot be more than 12" outside the rear tires
  2. Must be within 24" behind the centerline of your rear axle
  3. Cannot exceed 84" forward of the centerline of your rear axle
5. Tires/Wheels
  1. Max tire rim size:
    1. 0-13hp: max 12" rim
    2. 14-20hp: max 16" rim
6. Wheelie Bars
  1. Max length: cannot exceed 6" from the furthest part of rear tire
  2. Max height: 6" off ground
  3. May use steel or aluminum wheels or steel plates
7. Safety & Equipment
  1. All tractors must have factory shielding in place and around the belts
  2. Must have steel flywheels; no cast iron flywheels
  3. Must have nothing more than a V-pulley on the front of crank
Stock Altered (16 hp)
1. Must meet or exceed all Safety & Equipment (Section 3)
2. Refer to NQS Stock Altered specifications in addition to the following:
3. Weights: cannot exceed 84" forward of the centerline of your rear axle
4. Hitch
  1. Hitch is to be no more than 3/4" thick steel with a 1 1/2" hole for hook
  2. Pulling point may not be more than 3/4" from back edge of hitching device parallel to and not more than 13" above the ground.
5. Wheelie Bars
  1. Max length: cannot exceed 5" from the furthest part of rear tire
  2. Max height: 5" off ground
  3. May use steel or aluminum wheels or steel plates
6. Fuel Tanks
  1. May not be mounted to engine
  2. Must be vented away from engine compartment
  3. No pressurized fuel tanks
7. Safety & Equipment
  1. Engine side shield mandatory opposite cam side minimum of 1/8" steel or 3/16" aluminum. From bottom and to 4 1/2" above engine centerline of crank and minimum 7" wide centered on engine.
  2. Drive shaft must have support or safety loop
  3. Clutch: 360 degree shield made of 1/8" steel or 3/16" aluminum
  4. Drive belt: 180 degree top
  5. A minimum one (1) pound dry chemical fire extinguisher or equivalent. A gauge on the fire extinguisher is required. Extinguisher can either be dry chemical or CO/2-type extinguisher.
Super Stock (50 cube)
1. Must meet or exceed all Safety & Equipment (Section 3)
2. Refer to NQS Super Stock specifications
Ultra-lite Tractors (single-engine and multi-engine)
1. Must meet or exceed all Safety & Equipment (Section 3)
2. Must use motorcycle, snowmobile, or ATV motor(s)
3. Multi-engine ultra-lites must have 2 or more motors
4. Chassis:
  1. Maximum width: 72"
5. Tires/Wheels
  1. Maximum Tire Size
    1. Single-engine up to 250cc: 18x9.50x8
    2. Single-engine over 250cc: 26x12x12
    3. Multi-engine: 31x15.50x15
6. Hitches
  1. Must have a solid hitch with a 1 1/4" opening.
  2. Max hitch length: 10" as measured parallel to the ground from the centerline of the rear axle
  3. Max hitch height
    1. Single-engine up to 250cc: 13"
    2. Single-engine over 250cc: 16"
    3. Multi-engine: 13"
7. Wheelie Bars
  1. Single-engine: may use steel or aluminum wheels or steel plates
  2. Multi-engine: must use steel plates
  3. Max length: cannot exceed 6" from the furthest part of rear tire
  4. Max height: 6" off ground
8. Weights
  1. Single-engine: cannot exceed 84" forward of the centerline of your rear axle
  2. Multi-engine: cannot exceed 96" forward of the centerline of your rear axle
9. Safety & Equipment
  1. Carburetors facing in the direction of the driver must have a shield between the carburetors and the driver and shield can be no further than 6" from the air cleaner(s)
  2. Must have a side shield on chain to protect the driver's foot and shield should exceed the chain by 2" in all directions
  3. Exhaust must not be pointed toward the crowd; it must be pointed up or down
  4. If snowmobile engine(s) are used, a 1/4" thick steel guard 180 degrees horizontal must be used to completely cover the top, sides and ends
  5. When your legs are out by the wheels on a modified ATV or an ultra-lite tractor you must have a 2" restraint shield behind the legs with the centerline of the tire to protect your legs
  6. Must have 360-degree shields on all couplers and 180-degree shields on drive chains
  7. All throttles must be spring-loaded
V-8 Small Block Minis
1. Chassis
  1. Maximum length: Not to exceed 96" in length from centerline of rear axle
  2. Maximum width: 72"
2. Tires/Wheels
  1. Max tire size: 31x15.5x15
  2. Front tires must track within rear tires
3. Hitch
  1. Must be approved by tech person
  2. Max hitch height: 13"
  3. Max hitch length: 12" as measured parallel to the ground from the centerline of the rear axle
4. Wheelie Bars
  1. Max length: cannot exceed 6" from the furthest part of rear tire
  2. Max height: 6" off ground
  3. Must have steel plates (no wheels)
5. Weights: cannot extend beyond rear tires
6. Engine
  1. Max displacement: 436ci
  2. Block: factory stock or Dart block are acceptable
  3. Headers: must point directly upward
  4. Carbs
    1. Limited to 1 (one) four barrel carb
    2. Factory stock or aftermarket Holley or Edelbrock allowed
    3. Not to exceed 750cfm. Must have the numbers to verify CFM.
  5. Intake: factory stock or aftermarket are allowed
  6. Heads
    1. Factory stock or aftermarket are allowed
    2. No hemi style heads
  7. Flywheel: must have steel or aluminum flywheel (no cast)
  8. Fans: electric plastic fans only (no metal fans)
  9. Ignition: no mags
  10. SFI approved harmonic balancer or 3/8" steel harmonic balancer cover for stock balancer 360 degrees and front faceplate attached with 4-3/8" bolts
7. Safety & Equipment
  1. Must meet or exceed all Safety & Equipment (Section 3) in addition to the items below
  2. Roll over protection is mandatory
  3. Engine block must be shielded from the bottom of heads to the bottom of crank throw and from the front of the block to the back of the block with 1/8" steel
  4. Must have a minimum 3/8" cable around axle and across hitch
  5. Must have reverse light on back of tractor
  6. Neutral lock is required
  7. Must have fenders to protect the driver from contact with tires
  8. Seats/Restraints
    1. All seats will have a back support of at least 12"
    2. If the seat is not between the fenders it must have some kind of side restraints
    3. Seat belts are mandatory and a harness is recommended
    4. Horse collar under helmet is required
  9. Transmission/Driveline
    1. Must have SFI approved bell housing on all manual transmissions with block saver plate
    2. Automatic transmissions must have SFI approved scatter blanket to cover complete transmission
    3. Transmission must have and utilize rear transmission mount
    4. All moving driveline components must be shielded 360 degrees
  10. Throttle
    1. Must have a dead man throttle (spring loaded) with acceleration in a forward manner
    2. Must use Morse type throttle cables
  11. Tractors must have ignition kill switch centered directly above hitch (If an electric fuel pump is used it must be wired to the kill switch)
8. Fuel: pump gas including e85, cam 2, Unocal racing gas, etc.