2019 RCSX Supplemental Rules

The following Rules supplement the current AMA Racing Rulebook, which governs amateur racing. Current AMA members in good standing may compete. For the 2019 AMA Racing Rulebook, go HERE.

Revised: 1.16.19 


  1. The following riders may enter the Open Pro Sport class only: Pro licensed riders who did NOT qualify for the Final 40 in an AMA Supercross in 2018 or 2019. Pro licensed riders who DID qualify for the Final 40 in an AMA Supercross in 2018 or 2019 are not eligible to participate in the program in any class.
  2. Riders who have ever been issued a Pro Motocross or Pro Supercross license from any country or an FIM MXGP or MX2 license, and earned a professional point, are not eligible for any “B”, “C”, “B/C” or College (18-24) class.
  3. Riders who have ever been classified as a Pro, Pro-Am, or “A” rider in a non-youth class, are not eligible for any “B”, “C” or “B/C” division, unless reclassified by AMA.
  4. Riders who placed in the top 5 overall in a "B" class at the 2017 AMA Amateur National Motocross Championship at Loretta Lynn’s, and who are 17 years of age or older as of January 1, 2018, are not eligible to compete in a "B" or “B/C” division, unless reclassified by AMA.
  5. Riders may not participate in a “C” division if they have ever:
    a. Received any type of OEM factory support in any class (excluding OEM contingency and trackside support);
    b. Earned a Rider Performance Value (RPV) of 15.0 or higher the previous advancement year (Nov. 1, 2017 – Oct. 31, 2018) in any class, including youth divisions; or
    c. If they have raced in a “C” division in 2017 and 2018 and have an RPV of 13.0 or higher as of Oct. 31, 2018.
    d. For more information regarding “C” class eligibility and/or reclassification, or to check RVP status, visit click amaracing.com
  6. Riders competing in the WMX (16+) class are not eligible to compete in the Women Amateur (12+) class.


  1. 2020 model machines are NOT eligible in any class. 
  2. The following are NOT permitted in the LIMITED CLASS:
    a. High compression pistons, port clean-up; metal hand guards; or aftermarket ECU units.
    b. Changes or modifications to the internal engine components, frame, sub-frame, carburetor, EFI throttle body, air box, intake boot, swing arm, rim size, lower/bottom triple clamp, and wheel hubs. Engine blue printing and crank balancing are prohibited.
    c. All parts of the exhaust system as designed by the manufacturer (OEM) for a particular model and year must remain stock. This includes, but is not limited to, the head pipe, mid pipe, and silencer. Updating to a more recent year exhaust is prohibited unless the OEM part number is the same. The silencer end cap may be changed for the sole purpose of inserting a spark arrestor, so long as there is no performance enhancement.
    d. Gaskets, air filter screen, O-rings or other components may NOT be removed.
    e. Only production tires readily available to the general public may be used. 
  3. The following ARE permitted in the LIMITED CLASS:
    a. Replacement fuel filters, air filters, gas line, handlebars, crossbar pads, non-metal open-ended hand- guards, serrated foot pegs, lower fork leg protectors, spokes and nipples, decals, spark plugs, spark plug caps, sprockets, handlebar mounts, seat covers, and upper triple clamp.
    b. Programming or mapping changes to the stock OEM ECU unit and carburetor jetting ARE permitted.
    c. Cylinder re-plating is allowed but must retain the original manufacturer’s bore and port specifications.
    d. Clutch plates, pistons and piston rings may be accessory items, so long as they maintain the stock shape, design and material of the OEM parts.
    e. Material may be added to the existing frame for strength, including welding.
    f. OEM front and rear suspension can be altered with internal modifications only.
    g. Shock linkage and suspension spring rates may be changed to any commercially available part.
    h. Rims can be replaced with OEM or aftermarket rims of the same size and width.
    i. Front fork/rear linkage holeshot devices (aftermarket or OEM).
    j. All other internal engine components must be stock OEM parts.
    k. Changes that are cosmetic in nature are allowed, so long as there is no performance advantage. 

    Any items not listed above may be changed or modified. Please reference the AMA Limited Class Clarification Chart for more details.


  1. Riders may enter a total of three (3) classes.
  2. Age for Youth classes is based on the rider’s age on January 1, 2019. For all other classes, age is based on the rider’s actual age as of the day of the event. Proof of age must be available upon request by Race Officials at any time. 
  3. Riders under the age of 18 years must have a parent present or a duly notarized parental consent form, as required by the AMA Rules and Regulations, in order to participate. Minor Release and Waiver of Liability forms must be completed by minor participants and their parent/legal guardian at the event upon Rider Check-in/Registration. 
  4. Medical Insurance: Riders must have medical insurance coverage effective throughout the event in order to compete. 
  5. Riders must declare their race numbers upon registration. In the event of duplicate numbers in the same class, numbers will be assigned on a first-come basis.


  1. The race format will consist of the following:
    a. For classes with more than 34 riders: (2) Heat races, (1) Last Chance Qualifier (LCQ), and (1) Main event.
    b. For classes with 34 or less riders: (1) Heat race to determine Main event gate pic and (1) Main event.
  2. All riders will be able to participate in a minimum of two competitive events per class.
  3. The number of Heat races will be determined based on the number of entries in the class. All classes will be capped at a pre-determined number of entries.
  4. The Main event will be limited to 34 riders.
  5. A/Pro Sport classes will not receive a purse payout.


  1. Only the rider and one mechanic will be allowed to the starting line.
  2. The Start Procedure is as follows: 
    • 2 Card will be held for 10 seconds
    • 1 Card will be held for 10 seconds
    • 1 Card will be turned sideways
    • Gate will drop between 2 and 5 seconds

    Mechanics must step behind the backstop at the display of the 1 Card. 

  3. A rider may request a 2-minute grace period for minor repairs at any time prior to or during display of the 2 Card. Once the 1 Card is displayed, no additional time will be given.   Only one grace period will be given per moto. Grace periods will not be given to clean equipment or for cosmetic purposes.
  4. Once the race has started the mechanic may go to the designated Signal Area only. If a mechanic is found to be outside the designated Signal Area or in a restricted area such as the infield, he/she will lose their privilege and will not be allowed to return. 
  5. If a rider goes off the track he must re-enter at the safest location without gaining an advantage. Riders may gain an advantage without gaining a position. 
  6. Outside assistance is prohibited. If a rider needs to make repairs to their machine they may do so on the side of the track but without assistance. Riders can receive assistance in the Signal Area. 
  7. A motorcycle that returns to the paddock during the race will not be permitted to return to the competition.
  8. Motorcycles may be ridden to/from the paddock and the starting area only. Riding in unauthorized areas is grounds for disqualification.