Technical Bulletins

Note: These PDF's are to determine basic component dimensions and weights not posted in Section 675 Chart. In the event of conflicting specifications the Section 675 Chart's specifications take precedence.

 

(10-08-09) TaG PRD Engine Specifications

(12-17-09) Tag Motori 7 Engine Specifications

(07-14-09) Gazelle and mini-swift pistons information

(07-06-09) ROKTT Engine Specifications


(06-02-09) Gazelle 60cc engine specifications


(05-07-09) TaG Leopard Engine Specifications

 

2010 Rule Updates

Note: The list below includes 2010 Rulebook updates only. To obtain a copy of the current Rulebook please contact the IKF Office.

 

Section 102.2.1 Rule Change Enactment

Rules go into effect 30 days after being posted on the IKF Website.

 

2010 Rule Updates

03/08/2010: Section 213.4

03/08/2010: Section 404.4

02/17/2010: Section 603.2.19

02/12/2010: Sections 312, 312.2.1

02/05/2010: Sections 101.3.4.1, 101.4, 212, 404

01/27/2010: Sections 212.2.1, 212.4

01/25/2010: Sections 312.2.1, 312.4, 404.2.1, 404.4

01/25/2010: Section 657

01/05/2010: Sections 275.5.2, 275.5.3.1, 275.5.3.2, 675

12/30/2009: Section 200.1

 

02/05/2010
Section 101.3.4.1 #3, #5, #6, #8

Remove: "with participation from at least two regions".

 

02/05/2010
Section 101.4 Election of IKF Board of Directors

Change to read:

101.4.1 Ballots for election to the Board of Directors shall appear in the August issue of Karter News each year. Two nominations are required for a Candidate to be placed on the ballot for the Board of Directors.

101.4.2 Nomination Forms must be returned to the IKF Office by September 5, or the next businesss day, to be valid.

101.4.3 Nomination Acceptance Forms shall be mailed to each Nominee by September 10.

101.4.4 Acceptance Forms and Nominee Platform must be received at the IKF Office by September 24 to be placed on the Ballot.

101.4.5 Nominees and their Platforms will appear in the November issue of Karter News.

101.4.6 Ballots will be sent to the membership before November 15.

101.4.7 Voted ballots must be returned to the Accountant by December 7.

101.4.8 Ballots will be counted after the Fall Board of Directors meeting. Results of the election will be place on the website and in Karter News as soon as possible.

101.4.9 Newly elected Directors will take their office at the January Board Meeting.

 

12/30/2009
Section 200.1 IKF 2 & 4 Cycle Sprint Tire Groups for Grand Nationals

Move 2 Cycle Sprint classes Senior Super Sportsman and Senior Super Sportsman Heavy from "Group 2" to "Group 3"

 

02/05/2010
Section 212

Add: Effective with the 2011 2 Cycle Sprint Grand National, the date of the event will be the last two weeks of August or the first two weeks of September.

 

01/27/2010

Section 212.2.1 Approved Local Option Classes

Kid Kart 150#

Jr. Super Sportsman Heavy 310#

Sr. PRD Spec 360#

Junior HPV 1 Heavy 250#

Kid Kart Heavy 160#

Junior HPV 2 Heavy 330#

Jr. II PRD Spec 320#

Sr. PRD Spec Heavy 380#

Junior I Comer Heavy 235#

 

01/27/2010

Section 212.4 Official Schedule:

Day 1
1. Kid Kart……………………………..…………….150
2. Rookie Sportsman………………..………….…235
3. Jr. Super Sportsman Heavy……………………310
4. Sr. PRD Spec…………………………...……….360
5. Jr. HPV 1 Heavy…………………..……………..250


Day 2
1. Kid Kart Heavy……………………..…...........…160
2. Jr. 1 Comer………………….……….....…........225
3. Iame Cup……………………….………............per IKF
4. Jr. HPV 2 Heavy……………….……….............330
5. HPV 3…………………………..……......….......340

 

Day 3
1. Jr. 2 PRD Spec………………………….......320
2. Sr. PRD Spec Heavy…………………..........380
3. Jr HPV 1…………………………………...…240
4. Jr. Super Sportsman (rlv 2 pipe)…….....…300
5. Sr. Super Sportsman (rlv 3 pipe)……........340

 

Day 4
1. IKF TaG…………………………………….…per IKF
2. Jr. 1 Comer Heavy…………………………...235
3. HPV 4…………………………………….……340
4. Jr. HPV 2……………………………………....310
5. Sr. Super Sportsman Heavy (rlv 3 pipe)…,,360

 

03/08/2010
Section 213.4 Official Schedule

July 1

Junior I Briggs Gas Animal Light

Junior II Briggs World Formula

IKF Briggs World Formula Light

Briggs Animal Heavy

F200

Briggs World Formula Masters

Formula 80 Masters

Formula 80 Senior

 

July 2

Junior I Briggs Gas Animal Medium

Junior II Briggs Animal

Junior II IKF Briggs World Formula Heavy

IKF Briggs World Formula Medium

Briggs Gas Animal

Masters

125 Stock Moto

Formula 80 Heavy

Formula 80/85 Junior

 

July 3

Junior I Briggs Gas Animal Heavy

Junior II Briggs Gas Animal

IKF Briggs World Formula Heavy

Briggs Animal Medium

IKF LTD Mod Briggs Animal

F200 Heavy

125 Stock Moto Heavy

Formula 80 Limited

 

01/05/2010
Section 275.5.2 IKF TaG Junior Class

Add: Parilla Leopard MY09 335#

Weight to be reviewed by March 31, 2010

 

01/05/2010

Section 275.5.3.1 IKF TaG Senior

Add: Parilla Leopard MY09 385#

Weight to be reviewed by March 31, 2010

 

01/05/2010

Section 275.5.3.2 IAME Cup

Add: Parilla Leopard MY09

 

02/12/2010

Section 312 Change

IKF Road Race Grand National Schedule (add as second sentence:)

For the 2010 Road Race Grand Nationals only, the TaG Enduro class will run for thirty (30) minutes instead of forty five (45) minutes.

All class rules and weights apply per Section 301.

 

02/12/2010

Section 312.2.1 Approved Local Option Classes for 2010:

NCK TaG Enduro II - same class as TaG Enduro (per Section 301), except class will run for thirty (30) minutes instead of forty five (45) minutes.

 

1/25/2010

Section 312.2.1 Approved Local Option Classes for 2010:

WC Super Stock CR125 Heavy - 16+ - Weight TBD

NCK TaG Enduro II - 16+ - 410#, TaG Light Weights, 390#

WC TaG FBO Heavy - 16+ - TBD

WC Super Stock CR125 - 16+ - 400#

Super Stock Sit Up - 16+ - 320/340#

WC TaG FBO - 16+ - 400#

80cc Laydown II - 16+ - 410#

Yamaha Sportsman (Laydown - can on a stick) - 16+ - 400#

 

01/25/2010

Section 312.4 Official Schedule:

Day 1

Paid Practice

 

Day 2

TaG Light

Formula 80 Junior

Formula 80 Senior

Formula 125 Limited Heavy

Yamaha Limited Heavy Sprint

IKF Briggs World Formula Medium

Rotax Max Junior

Rotax Max Light

WC Super Stock CR125 Heavy

 

TaG Light

Formula 80 Junior

Formula 80 Senior

Formula 125 Limited Heavy

80cc Laydown

NCK TaG Enduro II

Yamaha KT100S Heavy

Rotax Max Junior

Rotax Max Light

WC Super Stock CR125 Heavy

 

 

 

Day 3

WC TaG FBO Heavy

WC Super Stock CR125

Yamaha Limited Light Sprint

IKF Briggs World Formula Heavy

Intercontinental-E

Rotax Max

Formula 125 Limited

 

TaG FBO Heavy

WC Super Stock CR125

TaG Enduro

Super Stock Sit Up

Intercontinental-E

Rotax Max

Formula 125 Limited

 

Day 4

WC Tag FBO

Super Stock CR125

80cc Laydown II

Yamaha Sportsman Heavy (Can on a stick)

TaG Heavy

Formula 125

Unlimited/FKE III

 

TaG FBO

Super Stock CR125

125/150 Open FKE II

Yamaha KT100S Light

TaG Heavy

Formula 125

Unlimited/FKE III

 

02/05/2010

Section 404

Add: 2010 Grand National will be hosted by the Newton Kart Klub at Newton Kart Track

Newton IA

August 3-6, 2010

 

01/25/2010

Section 404.2.1 Approved Local Option Classes for 2010:

Kid Kart

Junior III Sportsman - 14+ - Junior II without restrictor plate - 275#

 

Updated 03/08/2010

01/25/2010

Section 404.4 Official Schedule:

August 3rd:

Registration

Parking

Pre-Tech

Practice 4-9pm

 

August 4th:

Junior I Heavy

Junior II Light

Junior Midget

100cc Super Stock Light

Super Sportsman (Super Box)

Yamaha KT100S Light

5pm Hot Laps

 

August 5th:

Junior II Heavy

Yamaha KT100S LTD

Senior Sportsman

Junior I Light

200cc Stock

Open Midget

5pm Hot Laps

 

August 6th:

Kid Kart

Junior III Sportsman

Yamaha KT100S Heavy

100cc Super Stock Heavy

Open

Super Stock Midget

5pm Hot Laps

 

August 7th

Rain Date

 

02/17/2010

Section 603.2.19 Pressure/Vacuum Test

Add: Division and Classes that are subject to this test.

Division 200 Classes:

Kid Kart

Junior I

Rookie Sportsman

HPV 1 Cadet

Junior Sportsman

 

Division 400 Classes:

Kid Kart

Junior I Light

Junior I Heavy

Junior II Light

Junior II Heavy

 

01/25/2010

Section 657 -Effective January 23, 2010

657.1 Conditions and Specifications specific to this class:


657.1.1 This set of rules provides engine rules that can be used in either Road Racing or Sprint.


657.1.2 Guidelines offered in these pages are subject to the term "Spirit and Intent" and apply to the technical aspects of this "Stock" shifter kart class. It is expected that all participants will adhere to the spirit and intent of these rules. These are guidelines for fair and equitable competition. They are not the basis to "read between the lines" in order to circumvent the intent.


657.3 Cylinder and Top End: 1997-1999 cylinders are legal. No modification or machining of the cylinder is allowed such as porting, adding or deleting ports, decking of top or bottom of cylinder, or re-Nikasil. Cylinder mounting flanges may be spot faced in the area where the nut meets the flange only. Some factory grinding is performed prior to the Nikasil process on many cylinders. The Technical Director reserves the right to disapprove any cylinder supplied by Honda and not modified. Some OEM cylinders may not be acceptable for IKF competition.


Cylinder length is 3.311 - 3.316.


Base gasket to be stock OEM 1999.


657.3.1 Exceptions: Stock power valves may be removed and after market plugs used, with no filing, welding, or modifying of the cylinder. The power valve actuator rod hole may be plugged. OEM power valve covers may be replaced with aftermarket plates.


657.3.2 Cylinder Head: Head must remain OEM with no modifications or machining of any kind. Head must fit factory profile using the Shockwave "Stock CR125" profile gauge. Removal of mounting boss and modifications to the water outlets, for the purpose of hose connection, are allowed.


Head gasket must be stock OEM.


Squish or deck height measurement through the spark plug hole will be a minimum of .050 thousandths, using .060 solder. This is not intended to be a minimum or maximum dimension. This dimension is a "quick" check to determine if any non-conforming modifications are present.

657.3.4 Piston, ring, wristpin and upper rod bearing must be stock OEM. No modifications of any kind. Lapping the bottom of the ring is permitted.


657.5 Intake System:


657.5.3 Manifold and reeds: Intake manifold must be stock 1999 OEM CR125 (Honda Part Number 16221-KZ4-A10 - most are marked KZM4) with no modifications. The reed cage must be 1999 CR125 (Honda Part Number 14100-KZ4-J11) After market replacement reeds will be allowed, including mono reeds or stiffeners. This only allows reeds that may be installed without modification to the 1999 reed cage and does not permit multi-stage reeds.

 

657.6 Ignition System:


657.6.2 The stator and flywheel must be stock 1999 OEM. Only repairs approved by the Technical Director may be done to the wiring. Stock flywheel key must remain in place with no modifications. The left hand lower limiting plate on the stator must be intact, with no modification. Either the factory limiting plate or SKUSA limiting plate (available from SKUSA) may be used. Machined aluminum stator slots, underneath unmodified limiting plates, are allowed at this time. No modification to the hold down bolts is permitted. Static timing must be controlled by the stock stator plate or the SKUSA plate. No modification to any of the components that change the static timing.


657.7 Exhaust System:


657.7.1 Exhaust: Only the following exhausts are allowed. No modification of any kind is permitted. Exhaust flange is open, but must meet OEM length dimensions. No spacers allowed between cylinder and exhaust flange except one OEM steel gasket.


RLV R2 standard stinger (part# 6800)
RLV R2 w/cross stinger (part# 6800/c)
RLV R4 (part# 6830)
RCE T-3


Competitors using either the #6800 or #6800/c pipes are allowed to reduce their minimum weight by 10 lbs.


657.7.2 Silencer: Exhaust silencer body shall be a minimum of 12 inches and a maximum of 14.5 inches in length. Diameter will be at least 3 inches . Factory produced silencers only, no modifications allowed.

 

01/05/2010

Section 675 TaG Engine Package Specifications Chart

Add: Parilla Leopard MY09 Specifications same as Parilla Leopard

 

*****

2009 Rule Updates

08/18/2009: Section 115.4

07/15/2009: Section 105.1.6.3.5

06/05/2009: Section 716.36.2

06/05/2009: Section 717.25.2

05/04/2009: Section 101.1.6

05/04/2009: Section 207

05/04/2009: Section 212.5

04/23/2009: Section 275.5.1

04/23/2009: Section 275.5.2

04/09/2009: Section 675.3

03/27/2009: Section 509.3

03/27/2009: Section 622.8

03/20/2009: Section 675.21

03/20/2009: Section 675.22

03/19/2009: Section 404.2

03/19/2009: Section 404.3.1

03/09/2009: Section 716.5.2

02/26/2009: Section 716.9

02/19/2009: Section 105.2.1

02/19/2009: Section 312

02/19/2009: Section 716.16.3

02/19/2009: Section 716.32

02/19/2009: Section 207

02/13/2009: Section 312.1

02/10/2009: Section 405.1

02/04/2009: January Board Meeting

02/03/2009: Section 213.4

02/02/2009: Disclaimer Below

01/28/2009: Section 405.1
01/27/2009: Section 105.6
01/26/2009: Section 301
01/02/2009: Section 212.4
01/06/2009: Section 275.5

 

Disclaimer:

The IKF does not endorse or determine the competition legality of products and services advertised in the Karter News Magazine, the Competition Regulations & Technical Manual, and on the IKF Web Site. The competitor is responsible for determining the legality of all their equipment for use in IKF sanctioned events.

 

02/04/2009
Section 101.1.5

Add as second sentence: Appointed IKF Director in Charge is not allowed to compete at the Grand National event.

 

05/04/2009
Section 101.1.6

Add as third sentence: At the discretion of the IKF Board of Directors, the Tech Director in Charge may compete at a Grand National. An assistant for the Tech Director in Charge must be approved by the IKF Board of Directors to take on Director responsibility while Director is on the track.

 

02/04/2009
Section 101.1.6

Add as second sentence: Appointed IKF Tech Person is not allowed to compete at the Grand National event.

 

07/15/2009
Section 105.1.6.3.5 Neck Collars

Change 2nd sentence to read: The Leatt-Brace Moto GPX, the Leatt-Brace Adventure, the Valhalla 360 and the EVS RC Evolution neck braces are allowed.

 

02/04/2009
Section 105.1.6.3.5 Neck Collars

Change 2nd sentence to read: The Leatt-Brace Moto GPX, the Leatt-Brace Adventure and the Valhalla 360 neck braces are allowed.

 

02/19/2009
Section 105.2.1 Pre-Race Inspection - Also called Pre-Tech

Add as new second paragraph:

Note: At Regional and Grand National Sprint and Road Race events, the "IKF Pre-Race Technical Inspection Checklist", also called "Self-Tech, may be used as an option to going through the traditional Pre-Race Technical Inspection Procedure.

 

01/27/2009
Section 105.6 Safety Fastening
In 4th paragraph, change all of "Exception" text to read:

Exceptions:

1) All-metal lock nuts, or bolts drilled and safety wired, are required to fasten brake disc to brake hub.

2) One-Use fasteners/Nylocks may not be used on previously drilled bolts without secondary retention as described above.

3) Ballast: All bolts used to secure ballast shall be fastened to the kart with a nut secured with a cotter pin or safety wire through a hole drilled in the bolt. (See Section 105.2.1.21)

 

02/04/2009
Section 114.4.1 Verbal Warning

Delete all.

 

02/04/2009
Section 114.5.2

Change all to read: Any driver disqualified from a main or final shall lose any possible awards, not points, for the class from which he was disqualifed.

 

08/18/2009
Section 115.4 IKF Experts

Add the following:

 

Section 115.4.1 Road Race

Mike Jones

John Kindhart

Todd Vandermolen

 

Section 115.4.2 2 Cycle Sprint

Mike Botelho Jr.

Robert Logan

Kyle Shriver

Clayton Snow

 

Section 115.4.3 4 Cycle Sprint

CJ Mooneyham

Bryan Stephanson

 

Section 115.4.5 4 Cycle Speedway

Gene Becker

Dane Williams

 

Section 115.4.7 Speedway Pavement

Jordan Ashelin

 

Section 115.4.8 Sprint Shifter

Travis Dunne

Mike Wright

 

05/04/2009
Section 207 2 Cycle Sprint National Championship Classes

Add: Effective in 2009 to allow the Kid Kart class be run as a Duffy class in 2 Cycle Sprint only.

 

02/19/2009
Section 207 #5 Jr. Super Sportsman

Engine Type to read: Yamaha KT100S / RLV SSX-V exhaust / engine clutch per 202.5

Weight to read: 300

Age to read: 12-15

 

01/02/2009
Section 212.4 Day 5
Change to read: IAME Cup @ 370

 

05/04/2009
Section 212.5

Add: Clarification of the 2009 2 Cycle Sprint Grand National, per the request of the sponsoring club, to allow the following classes to be run according to Region 11 local option rules: IKF TaG Cadet - Gazelle engine only; IKF TaG Junior - Leopard and Rotax Junior engines only.

 

02/03/2009
Section 213.4 Official Schedule

Day 2: Delete Formula 80/85 Heavy Local Option @ 375

Day 2: Add Formula 80/85 Masters Local Option @ 375

Day 3: Delete Formula 80/85 Masters Local Option @ 375

Day 3: Add Formula 80/85 Heavy Local Option @ 375

 

01/06/2009
Section 275.5 TaG Classes
Change last line to read: Senior classes for ages 16 - up.

 

04/23/2009
Section 275.5.1 IKF TaG Cadet Classes

Remove: WTP

 

04/23/2009
Section 275.5.2 IKF TaG Junior Classes
Add: Motori Seven Junior

01/26/2009
Section 301 Road Race Grand National Classes
Class #15 TaG Light
Change Rotax weight to read 370

 

02/04/2009
Section 306.2.2 Brakes

Remove Rotax Max from the last paragraph.

 

02/04/2009
Section 306.9.3.2 Bodywork

Change to read: Formula 125, Formula 125 LTD driver faring required, width 15" wide, see Diagram at Section 105.2.1.20.

 

02/04/2009
Section 306.9.3.2. 1 Bodywork

Add: Superstock CR125 CIK faring required per Section 201.9.3.

 

02/19/2009
Section 312 IKF RR GN Schedule 2009

Delete the 6th Paragraph: Allow a one race exemption for the 2009 Road Race Grand National to run the TaG Light and TaG Heavy classes with optional front brakes.

 

02/04/2009
Section 312 IKF RR GN Schedule 2009

Add as 6th Paragraph: Allow a one race exemption for the 2009 Road Race Grand National to run the TaG Light and TaG Heavy classes with optional front brakes.

 

02/13/2009
Section 312.1 Regional Championship Classes to be run in 2009 are:

Add:

Yamaha Sportsman Heavy

Gazelle 8-12 240#

Mini Max 9-12 255#

Super Stock CR125 Heavy - Same Rules except for weight 420#

Formula 125 LTD Hvy II

Formula 80 Sr Heavy - Same Rules except for weight 385#

Briggs & Stratton Animal - Laydown class - ages male 40+ / female 16+

100cc Open

Piston Port / HPV - Laydown class 400#

 

02/04/2009
Section 404 IKF Two-Cycle Speedway/Speedway Midget Grand National Schedule

A participant who resides outside the 200 miles from any IKF sanctioned regional races and participates in the 2 IKF sanctioned races at Newton IA on August 2, 2009, will be qualified to race the IKF 2 Cycle Speedway Grand National in Newton IA. Participants who meet the above criteria will not have to pay a waiver. IKF Membership required.

 

03/19/2009
Section 404.2 Official Schedule

Change all to read:

 

Day 1 August 4: Registration, Parking, Pre-Tech, Practice

 

Day 2 August 5: Heats, Semi-Mains, Mains

Junior II Light

Yamaha KT100S Light

Midget - Junior

100cc Super Stock Light

Midget - Super Stock

Senior Sportsman

 

3pm Hot Laps

 

Day 3 August 6: Heats, Semi-Mains, Mains

Junior II Heavy

Yamaha KT100S Heavy

100cc Super Stock Heavy

200cc Stock

Super Sportsman (Super Box)

Junior I Light

 

3pm Hot Laps

 

Day 4 August 7: Heats, Semi-Mains, Mains

Kid Kart - Demo

Junior III Sportsman

Yamaha KT00S Limited

Midget - Open

Open

Junior I Heavy

 

3pm Hot Laps

 

Day 5 August 8: Rain Date

 

03/19/2009
Section 404.3.1 Approved Local Option Classes for 2009:

Add:

Kid Kart - Demo

Junior III Sportsman

14 Years and Up (Attained Age)

Junior II without restrictor plate

310#

 

02/10/2009
Section 405.1 Official Schedule Day 5
Change the weight on the Junior II Briggs Animal Heavy to 320#

 

01/28/2009
Section 405.1 Official Schedule Day 5
Change the weight on the Briggs Animal Heavy Class to 370#

 

03/27/2009
Section 509.3 Plug Gauges Defined

Change the 4th sentence to read: Plug gauges larger than .361" are to be machined on each side to achieve a blade thickness of .215" minimum and .250" maximum.

 

02/04/2009
Section 600

Delete Spec Honda 125 class listed on page 99

 

02/04/2009
Section 601.1 SPEC FUEL PROGRAM FOR 2 CYC. SPRINT, SHIFTER, SPEEDWAY AND ROAD RACING

Change to read:

All 2-Cycle Sprint, Shifter, Speedway and Road Racing Grand National events will run spec fuel and oil as approved by the appropriate Technical Committee Chairman.

For 2009 VP MS98L Karting is the designated IKF fuel. All Regional and

Club events are encouraged to use this fuel. NOTE: Some classes in Shifter,

Speedway and Road Racing may require a higher octane fuel and may

request an exemption to this requirement. A request must be made, in writing

to the IKF office.  The request will be either be approved or denied by the

appropriate committee chair.

 

Section 601.1.1

Change to read: Each track will provide a source of gasoline, with VP MS98L being recommended.

 

Section 601.1.3.

Delete

 

Section 601.1.4

Change to read: Spec Fuel Test Procedure for use with racing fuel (VP MS 98L Karting recommended):

 

Section 601.1.4. 6.1

Change to read: Color, turbidity and odor will be evaluated by the Tech Inspector. Color, turbidity and odor will be evaluated on a sample removed from the carburetor end of the fuel line by the Tech Inspector into a suitable container provided by the Tech Inspector. If the Tech Inspector suspects fuel to be incorrect for any of these reasons, he will consult with the Race Director or other qualified person. The inspection team is reminded that every

consideration is to be given to the competitor prior to disqualification.

 

Section 601.2 FUEL TESTS FOR EVENTS NOT USING SPEC RACING FUEL (Pump gas)

Change to read: NOTE 1: IKF strongly recommends the use of the VP MS98L Fuel program for

all race events. Pump gas contains elements such as oxidizers than make efficient fuel testing very difficult. Because of this the possibility of non-conformance to fuel standards is much more difficult to determine.

 

02/04/2009
Section 620.57 Piston

Change to read: Piston must be IAME double ring only and as manufactured with mold number 2802 or 1319 and name cast inside. Maximum break on all machined edges .030” on skirt area only. The bottom ring on the HPV must be in place and is a non tech item. Rings to be of magnetic material.

 

03/27/2009
Section 622.8 Ignition

Add as 4th sentence: Machining the shanks of coil hold-down screws to provide additional coil position adjustment is not allowed.

 

03/20/2009
Section 672.22 Other

Add: No additional painting, plating or ceramic coatings of any component permitted. Some engines have been approved with anodized components, which are acceptable.

 

03/20/2009
Section 675.21 Rotax Max

Add: Rotax Max engines may be run with or without RMC seal. If run without seal, they are subject to all RMC engines rules.

 

04/09/2009
Section 675.3 Carburetors/Manifolds

Add to end of 1st paragraph:

TAG Carburetor Quick Reference Specifications (PDF)

 

03/09/2009
Section 716.5.2 Inside Diameter

Change 1st sentence to read: .885" must-go minimum, .905" no-go maximum.

 

02/26/2009
Section 716.9 Camshaft

Change 1st sentence to read: Maximum valve lift of 0.255" taken directly off the valve spring retainer at zero valve lash.

 

02/04/2009
Section 716.13 Head Gasket

Change 1/1/09 date to TBD.

 

02/19/2009
Section 716.16.3 Valve Length

Change to read: Minimum intake and exhaust valve length is 3.250".

 

02/19/2009
Section 716.32 Connecting Rod

Change last sentence to read: Minimum weight is 130 grams.

 

02/04/2009
Section 716.32 Connecting Rod

Change to read: Any aluminum rod allowed with or without bearing insert. Rod may not be lighter than a known stock Briggs rod, part number 555626. No under-sizing of rod is permitted. Rod may be clearanced providing the rod is in stock configuration with no dimpling or media blasting. Rod ends must be concentric with wrist pin and crank journal. The use of Briggs hex head bolts, part number 555654 is allowed. There may be a minor grinding of the cylinder for clearance of these bolts. Pending minimum weight approved by the Committee.

 

06/05/2009
Section 716.36.2

Change to read: Crankshaft journal diameter is 1.094" - 1.100".

 

02/04/2009
Section 717.15 Head Gasket

Change 1/1/09 date to TBD.

 

06/05/2009
Section 717.25.2

Change to read: Crankshaft journal diameter is 1.094" - 1.100".

 

02/04/2009
Section Section 721.2

Amend to read: End baffle of silencer is teched per dimensions shown in Section 700.1. Holes are .128" no go.

 

02/04/2009

Section 721.2.5 Add: Exhaust must be wrapped from just above flange to the end, including the welded on muffler.

 

02/04/2009

Section 721.4.1

Change “leaded” to “unleaded”.

 

02/04/2009

Section 800.9

3rd Paragraph Remove: “will not be subject to minimum participation numbers”. Add: “Junior classes, including local option classes, must have a minimum participation average of 3.0 (not 2.9) per regional event and jackets will be awarded”.

 

02/04/2009

Section 850.1

Change weight on the Superstock CR125 to 385#.