16.0  Pro Sportsman Rule Revisions
                  (Go to the appropriate section to read entire rule.)
 
  • 2/28/2020  Clutch: 
    •  No trick or multi disc clutches permitted
       
  • 2/2 /19  Tread width
    • Decreased to Max 72.0 inches or less
      • If over add 10 lbs per inch or 5 lbs per 1/2 inch to the right side
     
  • 12/31  Removed compression rule
  • 12/2   Weight   1450 Right Side
    • Allowances found elsewhere in the rules
      • -75 lbs to the right side for sealed 602
      • Add appropriate penalties for tread with as listed in section 12
            
  • 12/2   Tread width
    • Max 73.0 inches or less
      • If over add 10 lbs per inch or 5 lbs per 1/2 inch to the right side
         
  • Clutch: 
    •  No trick or multi disc clutches permitted except sealed 602.
    • Multi disc Clutch (Sealed 602 only)
      • Quarter Master 298103 – 7.25 2 disc-V-drive
         
  • Flywheel:  (All)
    • GM flex plate: 14088765 ONLY (Sealed 602 only)
  • 12/2  Wheels
    • 15 inch  x  8.0 max  inches measured at bead
    • Steel only
    • Minimum weight 20lbs
    • Bleeders/ Pressure relief valves not allowed
    • Minimum offset 2 inch
    • Maximum offset 4.5 inch
       
  • 12/2   Muffler
    • 12 inch minimum functioning mass produced muffler
      • Series reserves the right to refuse any muffler
    • Both  ends must be unmodified
    • Mufflers must be removable for inspection
    • Must be on each pipe
  • 12/2   Max 4 inch paper element allowed for air cleaner
  • 12/2  Vent Windows
    • May not extend past rear edge of windshield
       
  • 12/1   Section 11 Steering   Tie Rod ends - Heim joint replacements approved 
                                                                      Sleeve may be steel or aluminum .
  • 7/25  Wheel Spacers "Steel only" has been removed