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#.