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  • 2004 Rules Proposals
    to PVMX rules involve fine tuning of eligibility lists Among the additions 1975 76 Puch 250 MX twin carb Harry Everts Replica Historic 250 1982 Suzuki DR500z Gran Prix 500 1982 84 Yamaha YZ125 with YPVS system Ultima 125 These are the only eligible motorcycles in Ultima 250 allowed to use a power valve mechanism 1982 84 Yamaha YZ250 with YPVS system Ultima 250 Again no other eligible motorcycles are allowed to use a power valve mechanism 1983 84 Yamaha TT600 not XT600 This is the only model allowed in the class that is over the displacement limit of 580cc all Honda XR200s Ultima 250 Two equipment rules also were changed The first specifies that for Gran Prix and Ultima machines any OEM or aftermarket fork may be used up to and including the Ultima era The second modifies the carburetor rule to prohibit Mikuni and Keihin flat slide units on Historic or GP class motorcycles and states that active accelerator pump mechanisms must be disconnected or removed on these same machines Observed trials There were several alterations to the lines specified for the various classes and skill levels The PI line becomes an official fifth line in each section Also riding this line in addition to Premier Lightweight and Heavyweight Intermediates will be Rigid Expert entries Classic class riders move down one step Expert line two Intermediate PI and Novice line three To encourage more riders to volunteer to help at national events first place points will be awarded at any one event per year to someone who works as a checker or trialmaster Smith Lowry and Winget voted against the change Cross country A change was given final approval stating that riders may enter only one class in a one hour race for instance you cannot enter both Sportsman Open and 50 Two new changes also were okayed A rider s motocross skill level designation is used as the basis for cross country However the rider grading committee may assign a rider a separate skill level designation for cross country The Post Vintage class was split into classes up 200cc and over 200cc referred to as Post Vintage 200 and Post Vintage Open From the October 2003 issue of Vintage Views 2004 rules proposals The AHRMA Board of Trustees met Sept 19 in Denver Colo to review proposed rules changes for 2004 All proposals specific to a type of AHRMA competition went through the various Rules Eligibility committees with the board focusing primarily on those items that the committees recommended for approval or flagged for further discussion General rules proposals went directly to the board for consideration at this meeting What follows is a description of the actions taken on rules issues by the board at Denver All of the approvals are tentative General roadracing Trustees gave tentative approval to a new rule requiring that all machines taking part in AHRMA roadracing be equipped with an oil containment system such as a belly pan Requirements recommended by the committee are dry sump four stroke engines and two strokes one quart capacity wet sump machines the maximum machine oil capacity with a three quart minimum Trustees asked the R E Committee to consider a minimum containment capacity of one cup for dry sump engines and to look into the viability of using diaper type containment systems for dry sump motorcycles with very low ground clearance The committee s recommended requirements state that containment devices must be made of durable material not subject to tears rips or abrasive damage in normal operation They must be attached in a workmanlike manner with safety wire on mounting hardware and made so that they can be removed for inspection of the underside of the machine Faired machines may incorporate the containment device in the lower fairing parts All pans must have a dam at the rear to preclude spillage Oil absorbent material is recommended on the bottom of the pan All installations will be subject to the approval of the chief tech inspector Vintage roadracing Tentative approval was given to a proposal to allow any two stroke in Formula 250 and Formula 500 to use reed valve induction Also approved was a proposal permitting Historic Production Heavyweight machines to bump up to the appropriate Vintage Superbike class if the particular motorcycle qualifies The board asked the Vintage Roadrace R E Committee to look into prohibiting hydraulically assisted brakes and clutches Vintage Superbike The following proposals recommended by the Vintage Superbike R E Committee were given tentative approval by the board Move the year cutoff to 1982 for Japanese machines up to 1025cc provided the bikes meet all class requirements Move the Honda CB400F from the Middleweight class into Lightweight Allow stock OEM CV carburetors in the Heavyweight class Allow solid disc type wheels of the period in the Heavyweight class the board asked for some clarification of the proposal Do not make any engine displacement changes to the class structure for 2004 Sound of Singles Battle of Twins Sound of Thunder The committee proposed a comprehensive cleanup of Supersport and Production Singles rules to clarify gray areas and plug loopholes and the board agreed to these changes The SOS BOT SOT Committee noted that the current Supersport rules are woefully inadequate forcing committee members to spend a lot of time answering questions and requiring officials to create policy at the racetrack The proposed changes closely mirror the rules of the other major sanctioning bodies and clearly spell out what is and is not allowed Meanwhile the existing Supersport rules cannot adequately cover the large variety of machines permitted in Production Singles so the committee came up with a package specific to the needs of this class The full text of both proposals can be found here In other changes the board endorsed the following The 10 surcharge for SOS BOT licenses will be eliminated even though it will mean a loss of about 4 000 in revenue Rule 10 9 2 limiting bikes

    Original URL path: http://www.ahrma.org/ahrma_pdfs/Forms/resources/rulebook/2004_rules_proposals.htm (2016-02-12)
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  • 2003 Rules Proposals
    here for contact information The final rule decisions will be summarized in the December VV Your 2003 handbook also will be included with that issue Roadracing Increase overbore limits to prolong the usable life of cylinders Vote No AHRMA already has liberal bore limits and the proposal would have the potential to create a new horsepower war Allow early win shock TZs in the Formula 250 and 500 classes Vote No The classes are fine as is Allow four cylinder machines in all Formula classes to use Keihin CR type carburetors Vote No Clarify that Can Ams in Formula 250 may have aluminum or magnesium cases but are limited to engines with 57 5mm stroke Vote Yes Allow the Triumph T100 twin roller bearing engine in Classic Sixties Vote Yes Allow Weslake Nourish pre unit engines in 500 Premier Vote Yes Permit Hondas up to 200cc in 200 GP and remove 250cc machines from the class Vote No The class is fine as is Allow the Gardner carburetor in 350 GP Vote No two dissenting The committee had recommended the change reasoning that experience in 500 Premier shows that the Gardner is less expensive than an Amal GP easy to tune and has no apparent performance advantage Eliminate period style replacement from Historic Production carburetor rule 10 6 4a and revise to specify that carburetors must be OEM same type e g replace CV with CV Vote Yes The change is intended to ensure the class remains entry level Move the Honda CB400 four cylinder from Historic Production Heavyweight to Lightweight Vote Yes Place the Honda CB400 in Vintage Superbike Middleweight committee recommendation Vote Leave it in Lightweight one dissenting Eliminate the restriction in Vintage Superbike Heavyweight that limits Kawasaki 900s to the Z 1 with no updates Vote Yes Increase the allowable rim width to 4 5 inches in Vintage Superbike Vote Yes Opens up more tire choices without necessarily increasing speeds Allow forks up to 41mm diameter in Vintage Superbike Vote Yes Allow pre 1980 AMA four cylinder two valve Superbikes from the period limited to 29mm carbs and meeting all chassis rules Vote Yes Divide BOT Two Stroke into three subclasses Vote No Open BOT Two Stroke to 250cc V twins limited to SuperStock specifications Vote Yes The change would allow Aprilia Cup type machines in the class Create a class analogous to the International Classic Grand Prix Two Stroke race run at Daytona Tabled until November meeting Restructure the BOT classes as follows F 3 pushrod OHV twins to 900cc OHC two or three valve twins to 750cc and OHC liquid cooled four valve twins to 650cc F 2 pushrod OHV twins to 1250cc liquid cooled OHC twins to 750cc the Ducati 748 water cooled four valve must run in F 1 or air cooled two valve OHC twins to 1000cc F 1 remains the same except that liquid cooled four valve twins over 900cc rather than 800cc would be limited to SuperStock specifications Vote Yes Remove the phrase intended for street use only in Production Singles to open the class to supermotard type machines Vote Yes Modify the rule regarding red flag restarts for races of various lengths Vote Yes Note that the rulebook will be clarified so that all references valves in BOT and SOS classes will mean the number of valves per cylinder Dirt track All of the following proposals were recommended by the Dirt Track Rules Eligibility Committee and tentatively okayed by the board Clarify that Aermacchi H D Sprint machines in Classic 250 must be 250cc to avoid confusion with illegal 350cc models Eliminate the 30mm carburetor restriction for Bultacos in Classic 250 and impose the same 32mm restriction that applies to other two strokes in the class Eliminate Veteran as a national championship class after 2003 and replace it with another class to be determined Promoters could run Veteran as a support class after 2003 Replace the current Sportsman chassis wording in rule 15 5d with the following Sportsman class machines may use a production chassis from 1974 or earlier or an aftermarket chassis of the type and configuration used in North American dirt track competition prior to 1975 Typical eligible models include Champion Trackmaster and Redline Others must be submitted to the Dirt Track Rules Eligibility Committee for an eligibility decision Requests must be accompanied by documentation and photographs establishing the configuration and appropriate time line Accurate replicas of eligible dirt track aftermarket chassis are eligible as long as they conform to the original design and other class rules Emphasize in the TT rules 14 5d that Seventies Singles machines must conform to the same 7 inch 4 inch suspension travel limits as other classes Suggestions are being solicited for a replacement class for Veteran Among those posed so far are a Senior class for brakeless machines a split of Senior into heavyweight and lightweight divisions and a Seventies Two Stroke or Seventies Twins class The board discussed but took no action regarding concerns about the dominance of Sportsman 250 by Can Am powered machines It was noted that only Can Am engines with a 57 5mm stroke are vintage legal Vintage motocross The following proposals were granted tentative approval Remove also TS models from the list of Suzuki models in Sportsman 125 These machines are already listed as eligible for Classic 125 At the end of the Premier paragraph in rule 11 2b add Premier Lightweight four strokes must utilize the original cylinder head castings Villiers Starmaker powered machines are limited to the early MkI style coarse finned cylinder Villiers 32A 37A powered machines may use any period aftermarket alloy cylinder the Greeves Challenger head cylinder and or Alpha manufactured crankcases Change the opening sentence of 11 3e to If the rider grading committee deems it appropriate riders in the 50 and 60 classes may have a dual ability level with a lower rating in the Sportsman classes only Change 11 6f to A yellow flag indicates a

    Original URL path: http://www.ahrma.org/ahrma_pdfs/Forms/resources/rulebook/2003_rules.htm (2016-02-12)
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  • 2002 rules proposals
    Ultima 500 Rule 12 1 1c regarding forks on Historic class motorcycles underwent further adjustment and now reads 35mm leading axle Husqvarna and Betor forks are allowed provided they have been limited to a maximum of 9 inches of travel Early 9 inch travel Simons forks are allowed Fox Factory Forks are prohibited And finally are a couple changes affecting number plates One allows Expert class champions to carry the 1 plate with a letter suffix as was allowed during 2001 vintage MX The other specifies that a color equivalent to school bus yellow must be used for number plate backgrounds Cross country In addition to officially adding two classes corresponding to AHRMA s post 1974 MX category Post Vintage no separate engine displacement divisions and Post Vintage 50 a new vintage class was included for ridersover age 60 The BSA B40 was moved back from the Classic to Premier class The board approved the new preamble to the cross country section stating that events can include hare scrambles GPs hare and hound races enduros and ISDT type competition In terms of race procedures the rules now state that races can be ended early due to track conditions and starting waves should not be less than 30 seconds apart rather than one minute A rider now must complete one full lap in order to be scored General No changes to existing rules were made in trials or dirt track although the board did affirm the 500cc limit for Seventies Singles Dues were restructured so that competition membership is now 40 domestic or foreign Only U S members will have Vintage Views included at this rate Canadian and Mexican members who want to receive VV must pay an additional 10 per year and for members elsewhere in the world to receive the newsletter the extra cost is 20 The rate for non competition membership available only to U S residents is 30 The category of associate member was eliminated Rates are unchanged for Sound of Singles Battle of Twins roadracing endorsement Individuals applying for membership under age 21 will be required to provide proof of their age If you have questions about any rules contained in the 2002 AHRMA Handbook please contact the national office or the appropriate Rules Eligibility Committee listed in Section 17 Rules proposals from the October issue of Vintage Views Roadrace Allow the use of Gardner carbs in GP Formula and Sportsman classes Failed Allow the Keihin CR carburetor as like design in Formula and Sportsman classes Failed Include Honda 550 SOHC fours and 550 DOHC twins as eligible in Formula 500 Passed Add Honda CB400F with original bore and stroke 5mm overbore allowed in Formula 250 Passed Add to the list of eligible machines in 350 GP the Honda CB350F with original bore and stroke 5mm overbore allowed These must be serious GP replicas fully GP kitted with race tank and seat full fairing and 4 into 4 exhaust Passed Add to the list of eligible

    Original URL path: http://www.ahrma.org/ahrma_pdfs/Forms/resources/rulebook/2002_rules.htm (2016-02-12)
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  • Proposed Supersport & Production Singles Rules
    to conform to stock specifications Valves must remain stock Multi angle or radius valve jobs are permitted Transmission must use stock OEM parts for that model and year Shifter return or detent springs may be replaced Spark plugs clutch plates clutch springs and oil filters may be replaced Bodywork For motorcycles produced with full fairings replica replacement bodywork may be used If stock bodywork includes air ducting it may be removed If the ducting is retained it must be stock or exact replica replacements and made of the same material as OEM Solo seat cowlings are permitted Replacement solo tailsections are permitted providing they conform to the shape and size of the stock bodywork OEM seats may be removed and replaced by foam padding Bodywork may be made of fiberglass plastic composite or carbon fiber Bodywork may be attached with non OEM fasteners such as Dzus For motorcycles produced without full fairings or with less than full fairings replica replacement bodywork from any U S legal production motorcycle may be used All other rules as detailed above apply Fluid retention lowers are STRONGLY recommended Note The Board of Trustees has tentatively approved a rule requiring all roadrace machines to have an oil containment system Number plates may be added to the rear seat section Original instrument fairing bracket may be replaced No composite or carbon fiber brackets allowed OEM fuel tank must be retained and used in the OEM location Fuel cap may be replaced Tires Racing slicks DOT approved race tires or non DOT approved rain tires may be used No off road or knobby tires allowed Suspension Rear shock s may be modified or replaced All linkage must remain stock Suzuki TL models are allowed to use aftermarket linkage to allow for replacing the stock rotary shock with a standard style shock Front fork springs may be modified or replaced Fork oil may be changed Fork caps may be changed Fork internals may be modified or replaced Fork braces may be modified or added Triple clamps may be modified only for the purpose of adding a steering damper Captive wheels spacers may be added Speedometer drive may be replaced with a spacer Steering dampers may be replaced or added Brakes Steel braided or Kevlar brake lines may be used Brake pads may be changed Brake rotors may be drilled Brake rotors may be replaced but must remain the same size as OEM No composite or carbon fiber rotors Brake calipers must remain stock Brake and clutch master cylinders may be replaced Clutch slave cylinders may be modified or replaced Induction Carburetor jets and needles may be replaced Re sizing of air metering holes in CV carbs is allowed Throttle slide and return springs may be replaced Fuel lines vent lines and fuel filters may be replaced All components in the fuel injection system must remain standard except the electronic control modules which can be modified or replaced OEM airbox must remain without modifications Air filter may be replaced

    Original URL path: http://www.ahrma.org/ahrma_pdfs/Forms/resources/rulebook/2004_rules_supersport.htm (2016-02-12)
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  • AHRMA Rulebook Section 17
    Gary Swan 818 891 0330 Vintage Motocross Rules Eligibility Matt Hilgenberg chairman 432 Lake Estates Dr Meadow Vista CA 95722 530 878 0700 fax 530 878 3610 info speedandsport com Dick Mann 772 Foothill Road Gardnerville NV 89410 775 265 4904 fax 775 265 4992 dickaymann aol com Don Rainey 410 Kingston Jefferson TX 75657 903 665 6513 donrainey53 juno com Technical consultants Dave Janiec 1216 Andrea Court Ridgecrest CA 93555 760 382 6013 lobo6y earthlink net James Smith 3155 Van Amberg Brighton MI 48116 9242 810 227 4187 ahrma4d aol com Post Vintage Motocross Rules Eligibility Al Wenzel chairman 3321 Roma Place San Ramon CA 94583 925 829 9386 wenzelal aol com Robert Borg 8120 N Hwy 91 Smithfield UT 84335 435 563 8640 fax 435 563 8642 Allen Brown 520 Nursery Drive North Mechanicsburg PA 17055 acd7448 yahoo com 717 576 1169 Technical consultants Dave Janiec 1216 Andrea Court Ridgecrest CA93555 760 382 6013 lobo6y earthlink net James Smith 3155 Van Amberg Brighton MI 48116 9242 810 227 4187 ahrma4d aol com Trials Rules Eligibility Matt Hilgenberg chairman 432 Lake Estates Dr Meadow Vista CA 95722 530 878 0700 fax 530 878 3610 info speedandsport com Bob Ginder Jr 1204 Bartons Creek Rd Dickson TN 37055 615 789 5956 fax 615 789 5725 b j racing worldnet att net Jim Lipscomb 2306 Benchmark Circle Salt Lake City UT 84109 801 467 4006 ahrma jimlipscomb com Dirt Track Rules Eligibility Craig Breckon chairman 11888 Long Lake Dr Sparta MI 49345 8596 616 887 9139 royalracing 39 msn com Gary Davis 11600 Cramer Road Auburn CA 95602 530 823 3227 Fuzzy Hutto 803 331 7529 tkhutto alltel net Advisor Robert Mclendon III 2400 Fernwood Ave Pensacola FL 32505 850 637 5838 mrboostfade gmail com Cross Country Rules Eligibility James Smith chairman 3155 Van Amberg Brighton MI 48116 9242 810 227 4187 ahrma4d aol com Teddy Landers 6670 Country Road 8800 West Plains MO 65775 417 256 0699 teddy tlanders com Corky Root 7901 40th Ave N Lot 94 St Petersburg FL 33709 727 543 0033 Awards Committee Selects recipients of special annual awards and coordinates presentation of those awards Craig Breckon 11888 Long Lake Dr Sparta MI 49345 8596 616 887 9139 royalracing 39 msn com David Pierce PO Box 2802 Farmington NM 87499 2802 505 564 4730 motogeezer mac com Debbie Poole 905 Tiburon Blvd Tiburon CA 94920 415 435 0768 pooleschl1 hotmail com Risk Management Committee Deals with issues relating to safety and reducing risks to members and to the association Rob Stickler chairman 30355 RCR 14B Steamboat Springs CO 80487 home 970 879 0277 work 970 879 2410 fax 970 879 3377 home rhstickler com Jeff Smith 4000 Mountain Lane Wausau WI 54401 9200 715 842 9699 jeffrene dwave net Bob Goodpaster 403 N Wisconsin St Hobart IN 46242 219 942 2401 norton80 1 msn com Benevolent Fund Advisory Committee Advises on investment decisions and contribution requests for the Benevolent Fund Bob Goodpaster 403 N Wisconsin St

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  • AHRMA Rulebook Section 16
    involvement by a member including in the case of a business entity involvement by any stockholder director officer employee partner or agent thereof in conduct deemed inappropriate by AHRMA at its sole discretion shall result in such penalties as may be imposed by AHRMA including but not limited to revocation of AHRMA membership AHRMA reserves the right to reject any application or revoke any membership for cause so long as such rejection is not based on race creed color sex or national origin The decision to reject or revoke membership or impose other penalties shall be made by the Board of Trustees The Board of Trustees shall immediately notify the member so suspended in writing of the suspension The suspended member shall thereafter be entitled to a reasonable opportunity to be heard in person or through a representative by the Board of Trustees or a committee appointed by it The Board of Trustees may thereafter rescind or terminate the suspension or continue the suspension for a definite term or expel the member and its decision shall be final Benevolent Fund The Benevolent Fund was created in 1992 as a means of helping AHRMA members in need anyone who wants to make a request or suggestion for assistance should contact the AHRMA office AHRMA offers a variety of raffles and other fund raisers benefiting the Benevolent Fund Members also are encouraged to contribute directly Assistance of up to 1 000 for any incident is available from the fund To be considered the person must be a member in good standing for at least one year and the injury must have occurred at an AHRMA permitted event The person s injuries must have been reported to a race officials by the end of the day when it occurred Applications involving exceptional circumstances but not associated with an AHRMA event may also be considered Application forms are available from the AHRMA national office The form may be completed by someone other than the injured member Final decisions on assistance is made by the Executive Committee after a recommendation is made by the Benevolent Fund Advisory Committee All applications for assistance are kept confidential Agreement Not to Sue and to Indemnify In order to promote the sport of motorcycle racing to achieve prompt and final competition results and in consideration of receiving the numerous benefits to them all members including competitors and officials expressly agree that determinations by AHRMA officials and rulings of the Board of Trustees when made as to the applicability and interpretation of AHRMA rules are non litigable and they covenant that they will not initiate or maintain litigation of any kind against AHRMA or anyone acting on behalf of AHRMA to reverse or modify such determination or to recover damages or to seek any other kind of relief allegedly incurred or required as a result of such determination If a member competitor or official initiates or maintains litigation in violation of this covenant that member competitor or official agrees to

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  • AHRMA Rulebook Section 15
    divided into engine displacement classes 15 1 2 Post Vintage For most events class eligibility parallels AHRMA Post Vintage motocross Section 12 The minimum age for riders is 16 a Historic 200 Historic class machines manufactured as 88 200cc Novice Intermediate Expert b Historic Open Historic class machines manufactured as 201cc and larger Novice Intermediate Expert c Post Vintage 200 G ran Prix and Ultima class machines manufactured as 88 200cc Novice Intermediate Expert d Post Vintage Open G ran Prix and Ultima class machines manufactured as 201cc and larger Novice Intermediate Expert e Post Vintage 50 Any rider age 50 or more on a Post Vintage eligible motorcycle Novice Intermediate Expert not further divided into engine displacement classes f Post Vintage 60 Any rider age 60 or more on a Post Vintage eligible motorcycle Novice Intermediate Expert not further divided into engine displacement classes g Post Vintage 70 Any rider age 70 or more on a Post Vintage eligible motorcycle Novice Intermediate Expert not further divided into engine displacement classes 15 2 RACE PROCEDURES 15 2 1 It is recommended that a cross country track not be less than 3 miles in length For safety reasons the course should be laid out and pre run by someone riding a four wheeler One parade lap for all competitors is strongly encouraged 15 2 2 A race should run no less than one hour before the first finisher is flagged off unless track conditions require an earlier finish 15 2 3 Classes may start in waves or may be consolidated to form suitable waves There will be a time gap between waves of not less than 30 seconds If a rider leaves the starting grid in a wave PRIOR to the one he she is assigned to there will be an automatic one lap penalty There is no penalty for leaving in a LATER wave Dead engine starts are encouraged There will be no overall winner only class winners 15 2 4 If more than one event is run on the same course on the same day classes may be mixed or added but must be advertised prior to the event 15 2 5 All cross country events will be scored as a single event even if multiple day events 15 2 6 A competitor must pass between all gates created by marking and within 15 feet of any trail marker 15 2 7 A rider must complete at least one full lap to be scored as a finisher in hare scrambles cross country type events or the first regular checkpoint in enduros hare and hound and ISDT type events 15 2 8 Every rider must come to a complete stop each lap at the scoring point until signaled to proceed 15 2 9 A rider may not enter more than one class in a one hour race 15 2 10 A rider s motocross skill level designation is used as the basis for his her cross country skill designation However

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  • AHRMA Rulebook Section 14
    50 or older on any Sportsman eligible machine 14 2 10 SUPER SENIOR Riders age 60 or older on any Sportsman eligible machine 14 2 11 NOVICE A non championship class for entry level riders on any Sportsman eligible machine displacement breakdowns for 0 250cc 251 600cc and 601 750cc may be run but will be combined into one class in instance of a low rider turnout 14 2 12 SUPPORT CLASSES Sportsman 125 Seventies Twins see below and Veteran riders age 35 and older on Sportsman machines may be run as support classes at the promoter s discretion a Seventies Twins A support class for late 1970s style dirt track racers including Harley Davidson XR750s and Ducati 860s Twin cylinder Sportsman 750 machines are eligible as are other twins up to 850cc in capacity except XR750 Harley Davidson XR750s and Ducati 860s are limited to 750cc Chassis Similar to Seventies Singles limited to twin shock circa 1980 chassis with maximum 38mm forks and WM4 5 rims Wide dirt track tires may be used Carburetor rules are the same as Seventies Singles no modern flat slides or pumper carbs 14 2 13 EXHIBITION CLASSES AHRMA dirt track exhibition classes include a Board Track and like design dirt track machines b Two valve speedway machines on soft tracks where conditions allow 14 3 TT CLASSES 14 3 1 DINOSAUR 1951 and earlier with no limitations on valve arrangement or displacement 14 3 2 CLASSIC 250 1967 and earlier and approved design machines up to 250cc For machine list see 14 2 2 14 3 3 CLASSIC OPEN 1967 and earlier and approved design machines manufactured as 300cc and larger with no limitations on valve arrangement In addition to machines listed in 13 2 3 the following are eligible AJS Matchless Typhoon singles 600 650 750 twins BSA A10 A65 Harley Davidson XL XLR Norton 600 OHV singles or 650 750 twins Triumph pre unit or unit 650 14 3 4 SPORTSMAN 250 1974 and earlier machines up to 250cc see 14 2 4 14 3 5 SPORTSMAN 600 1974 and earlier machines manufactured as 251 600cc see 14 2 5 14 3 6 SPORTSMAN 750 1974 and earlier machines manufactured as 601 750cc see 14 2 6 Harley Davidson KH883cc sidevalve is eligible for Sportsman 750 TT only 14 3 7 SEVENTIES SINGLES Late 1970s era four stroke single cylinder motorcycles up to 600cc such as were raced in period TT events see 14 2 7 14 3 8 SEVENTIES TWO STROKE 1981 and earlier air cooled two strokes up to 250cc 14 3 9 SENIOR Riders age 50 and older on any Sportsman or Classic eligible machine 14 3 10 SUPER SENIOR Riders age 60 or older on any Sportsman or Classic eligible machine 14 3 11 NOVICE A non championship class for entry level riders on any Sportsman eligible machine displacement breakdowns for 0 250cc 251 600cc and 601 750cc may be run but will be combined into one class in instance of a low rider turnout 14 3 12 SUPPORT CLASSES Sportsman 125 Veteran and Seventies Twins may be run as support classes at the promoter s discretion see 14 2 12 14 4 RACE PROCEDURES a Riders may bump up from one period class to another providing the machine meets all the rules of the newer period class e g a Classic oval track machine may run in Sportsman after attaching brakes Machines may not move up to a larger displacement class b Shifting is allowed during any event in any class c Brakeless and braked machines must never occupy the track at the same time either in practice or during competition 14 5 DIRT TRACK TECHNICAL INSPECTION MODIFICATIONS a TIRES Knobby tires are not permitted AHRMA encourages the use of 19 inch front wheels and new tires for the safest and most predictable setup Following is the list of allowable tires Other tires may be added to the list from time to time by the Dirt Track Rules Eligibility Committee 19 inch tires Carlisle 51 S 4 00x19 Carlisle Avenger 4 00x19 or smaller Carlisle Universal 4 00x19 or smaller Continental Milestone 120 80x19 and 130 80x19 Dunlop K70 4 00x19 or smaller Dunlop K180F 110 80x19 Goodyear DT1 4 00x19 or smaller Goodyear Eagle DTII 27 0x7 0x19 Maxxis DTR 1 27 0x7 0x19 Pirelli MT53 4 00x19 or smaller 18 inch tires Avon GP1 4 10x18 and Gripster 110 80x18 Carlisle Universal 4 00x18 or smaller Dunlop K70 4 00x18 or smaller Dunlop K180 120 90x18 Dunlop Trailmax 120 90x18 Metzeler Enduro 4 00x18 and Enduro 4 110 80x18 120 80x18 Pirelli MT53 4 00x18 or smaller Pirelli MT60 110 80x18 and 120 80x18 b WHEELS Rim width must not exceed WM3 2 15 for all classes c BRAKES Brakes are not permitted in Dinosaur or Classic classes As an alternative to brake removal an effective mechanical lockout may be used to disable rear brakes for these classes Any disc brake caliper with up to two opposed pistons is acceptable for Sportsman Operating front brakes are not permitted in flat track racing Hydraulically operated drum brakes are prohibited d CHASSIS Must be of the same period as the class in which the machine is entered Dinosaur machines chassis and engine must be made by the same manufacturer i e OEM chassis or replacement type offered by the engine manufacturer Frame modifications for Dinosaur class must be of period style Weld on rear axle holders are permitted but bolt on adjustable height rear axle supports i e Sonicweld type are not Swingarm frames are allowed in Classic classes only if they are production components for that make and year motorcycle and equipped with stock configuration swingarms Any aftermarket racing frame must be of rigid type hardtail or strutted to compete in Classic classes Post 1967 Champion Redline Trackmaster Ossa DMR Bultaco Astro and similar type dirt track frames are not allowed in Classic classes even

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