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  • More
    • Home
    • Club members
    • Rule Book
      • List of Classes
      • Operation of contest
      • Yearly Fees
      • points system
      • General Track Rules
      • flag person
      • General Tractor rules
      • Reason 4 Disqualification
      • teardown
      • stock class
      • stock 25 hp twin
      • mod stock/stock altered
      • pro stock
      • flat head Classic s.s.
      • open super stock
      • p.s.t.
      • limited outlaw
      • unlimited outlaw
      • unlimited outlaw
      • sleds
      • board of directors
      • tech people
      • Class representatives
    • Schedule
      • Calendar
      • Schedule
    • POINTS
      • 2021 Points
      • 2022 points
      • 2023 points
      • 2024 Points
    • Printable Rule Book
American Mini Pullers INC
  • Home
  • Club members
  • Rule Book
    • List of Classes
    • Operation of contest
    • Yearly Fees
    • points system
    • General Track Rules
    • flag person
    • General Tractor rules
    • Reason 4 Disqualification
    • teardown
    • stock class
    • stock 25 hp twin
    • mod stock/stock altered
    • pro stock
    • flat head Classic s.s.
    • open super stock
    • p.s.t.
    • limited outlaw
    • unlimited outlaw
    • unlimited outlaw
    • sleds
    • board of directors
    • tech people
    • Class representatives
  • Schedule
    • Calendar
    • Schedule
  • POINTS
    • 2021 Points
    • 2022 points
    • 2023 points
    • 2024 Points
  • Printable Rule Book

Stock 25hp twin:

1. All general rules apply.


2. Factory Stock, commercially available garden tractor with cast block engine. Engine, Chassis, and sheet metal must maintain stock appearance. 


3. Must use only OEM available unaltered parts for engine manufacturer. No performance improving alterations to engine parts allowed unless specifically noted in rules for this class. 


4. Modifications to clutch, driveline, and transaxle assembly are allowed to prevent breakage. 


5. Maximum 25 hp. block


6. No welding or modifying of block or cylinder head, Cylinder head must maintain stock combustion chamber lip and head gasket. 


7. Maximum bore size is .030 over manufacturer’s standard specifications. 


8. No fabricated manifolds, carburetor standoffs, velocity stacks, or spacers allowed, no two barrel carburetors. 


9. Carburetor must be stock, unaltered and unpolished. Choke butterfly and shaft can be removed. Air restricting venture must not exceed stock size for model, horsepower, and configuration. No gas 

fuel injection. 


10. Engine must be governor controlled, Maximum RPM is 4250, no variance will be allowed. 


11. Billet Steel or aluminum flywheels are allowed. No Welding or machining of cast flywheels. 


12. Dead man’s throttle is required. 

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