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.
(05-07-09) TaG Leopard Engine Specifications
(06-02-09) Gazelle 60cc engine specifications
(07-06-09) ROKTT Engine Specifications
(07-14-09) Gazelle and mini-swift pistons information
(10-08-09) TaG PRD Engine Specifications
(12-17-09) Tag Motori 7 Engine Specifications
(03-28-11) TaG My09 Leopard Engine Specifications
(01-17-14) PRD 125CC CONTROLLED TAG RULES v1
(01-23-14) PRD Controlled updates (Tech bulletins 18,19, 20)
(02-12-14) Parilla X30 125cc RL-C TaG
Note: These PDF's are for Honda Kid Kart Rules and Updates
(01-29-14) Honda kid kart GXH50 Class Information
Section 102.2.1 Rule Change Enactment
Rules go into effect 30 days after being posted on the IKF Website.
2014 Rule Updates
Section 110.12 Water Drinking Before Scales
Add: If authorized by the Race Director beforehand, drinking water from a clear plastic bottle (maximum 500ml) is allowed in the scale area before weighing. Any competitor that pours the water over their head or driving equipment may be penalized.
Add: Jeremy Clearwater - Eric Vanderploeg
Add: Justin Hanson & Kyle Heitz
Class #11 Briggs Gas Animal Masters
Change to read: Engine Type: Animal (718)
Sections 212.4, 213.4, 258.4 Official Schedules
Rookie Comer 80
IKF TaG Junior
Formula 80 Masters
Junior I Briggs Gas Animal Light
Junior II Briggs Gas Animal
Briggs Gas Animal Heavy
IKF Briggs World Formula Medium
Kid Kart Light
KPV 1 Heavy
KPV 2 Junior
IKF TaG Masters
Formula 80 Senior
Junior I Briggs Gas Animal Heavy
Junior II Gas Animal Heavy
Briggs Animal Medium
IKF Briggs World Formula Heavy
Kid Kart Honda
KPV 1 Cadet
IKF TaG Cadet
KPV 2 Heavy
Super Stock CR125 Heavy
Junior II Briggs World Formula
Briggs Gas Animal
IKF Briggs World Formula Masters
Jr. Super Sportsman
Super Sportsman Heavy
Super Stock CR125 Light
Briggs LO206 Junior II
Briggs Gas Animal Masters
IKF Briggs World Formula Super Heavy
Class #14 Briggs LO206 Masters
Change to read: Engine Type: Section 721
Section 404.4 Official Schedule
Tuesday, August 12
Junior I Light
Yamaha KT100S Light
Kid Kart 5-7 150# Exhibition
Wednesday, August 13
Junior I Heavy
Yamaha KT100S LTD
100cc Super Stock Heavy
Super Stock Midget
Thursday, August 14
Junior II Light
Yamaha KT100S Heavy
Sportsman Midget KT100S L-2 Pipe 16+
Friday, August 15
Junior II Heavy
Yamaha KT100S LTD Heavy 370# 16+
100cc Super Stock Light
Saturday, August 16 - Rain Date
No Official Practice for the event.
8pm Feature time all days.
Section 405.4 Official Schedule
Day One - Wednesday, July 16th
Briggs Masters LO206 Weight 360 age 35 and up
Briggs Junior I Light Weight 235
Briggs Junior II Light Weight 285
Briggs Stock Medium Weight 345
Putt Putt (Local Option) Trophy only no Duffy
Briggs Junior I Heavy Weight 270
Briggs Junior II Heavy Weight 320
Briggs Stock Heavy Weight 370
Day Two - Thursday, July 17th
Briggs Animal Blue Wazoom Hvy Weight 370
Junior I Light Clone Weight 235
Junior II Light Clone Weight 285
Adult Medium Clone Weight 345
Putt Putt (Local Option) Trophy only no Duffy
Junior 1 Heavy Clone Weight 270
Junior II Heavy Clone Weight 320
Adult Heavy Clone Weight 370
Day Three - Friday, July 18th
Silver Crown Adult Briggs Animal* Weight 360
*Must have earned a Duffy in an Adult Class to enter.
Briggs Animal Junior I Light Weight 235
Briggs Animal Junior II Light Weight 285
Briggs Animal Medium Weight 345
Briggs Animal Sportsman Weight 360
Briggs Animal Junior I Heavy Weight 270
Briggs Animal Junior II Heavy Weight 320
Briggs Animal Heavy Weight 370
Section 410.14.2.2 - Open 2-Cycle
Add: Stock 250cc Shifter 560 lbs.
Entrant must provide engine documents with technical specifications to the
Tech Director if requested.
Section 622.8 Ignition - Rookie Comer K80
Add: New Selettra ignition is approved with a 5 pound increase in the posted weight.
Shroud will be identified with a sticker handed out at Tech, with the responsibility of
the competitor to display on the engine shroud.
Section 719.16 Rocker Arms
Change to read: Stock Animal or World Formula rocker arms only - no modifications allowed.
Minimum length 2.850".
Add: Briggs & Stratton Vent Kit #555688 NOT ALLOWED.
IKF Rule Update – Section 722 (A COMPLETE RE-WRITING OF RULES)
722 STOCK INTERNATIONAL CLASS ENGINES
These rules describe the specifications of Clone Class Engines. All parts must be factory production parts unless otherwise specified. No machining or alteration of parts is permitted unless specifically noted. All parts are subject to be compared to known stock parts. No reading in between the lines. If it is not in the rules, then it must remain stock.
722.1 Clutches: Any dry clutch is allowed, applies to all classes
722.2 Fuel: 87 Octane pump gasoline only.
722.3 Fuel Tank: Must be floor mounted.
722.4 Carburetor: Huayi or Ruxing type carb only. Choke assembly must be in place and functional.
722.4.1 Venturi: 0.615" No-Go
722.4.2 Throttle Bore: 0.751" No-Go
722.4.3 Emulsion Tube: Must remain stock. 0.066" No-Go Minimum length 1.092
722.4.4 Low Speed Idle Jet: Non Tech
722.4.5 Main Jet: 0.042 No-Go
722.4.6 Throttle Shaft: Minimum Diameter 0.115"
722.4.7 Butterfly: Minimum Thickness 0.037
722.4.8 Black Phenolic Insulator Plate: Must be in place between carb and block. Plate hole is non-tech, but must maintain OEM shape. Fuel bleed off slot must be unaltered. OEM thickness must be maintained at .257 minimum
722.4.9 Clone Restrictors:
7220.127.116.11 Junior I one hole 0.425 No-Go ARC green
718.104.22.168 Junior II one hole 0.550 No-Go ARC blue
722.5 Fuel Pump: Any pulsed type fuel pump is allowed. Fuel pump must be pulsed from the valve cover, crankcase or side cover.
722.6 Air Filter: Any air filter allowed
722.7 Air Filter Adapter: Maximum Length 1.375"
722.8 Engine Block and Side Cover
722.8.1 Block: Decking of the block is permitted
722.8.2 Crankshaft: OEM crankshaft only, no modifications. Journal diameter 1.168” min. 1.180” max.
722.214.171.124 Governor: Governor and governor components are non tech. Removal of governor drive is allowed
722.8.3 Connecting Rod: OEM connecting rod only. OEM rod bolts only. Honing is allowed but must maintain factory defined edge. New Stock Performance cast rod allowed.
722.8.4 Wrist Pin: Overall Length 2.100” minimum, inside diameter .550” maximum
722.8.5 Bore: Maximum Bore 2.685"
722.8.6 Stroke: Maximum Stroke 2.133” +/- 0.010. Push piston down to take up rod play. Check stroke from BDC to TDC.
722.8.7 Side Cover: Side cover must be OEM, no machining allowed. Gaskets must be OEM configuration and are non tech. Sealer may be used.
722.9 Piston and Rings:
722.9.1 Piston: Piston must be unaltered OEM only. Standard bore is 2.685" maximum. Arrow on top of piston must be pointed toward valves / lifters
7126.96.36.199 Piston Pop Out: No piston pop-out is allowed. No tolerance is allowed.
722.9.2 Piston Rings: Top ring and middle ring .115” max. width, 0.060 max thickness. Piston rings must be self-supporting in cylinder bore. Oil ring assembly must be self-supporting in cylinder bore when checked installed on piston with connecting rod attached. Rings must be in one piece (unbroken) when presented for tech. Filing of ring end gaps permitted with max Ring end gap of .040”
722.10 Cylinder Head: Must be OEM castings only. Porting and/or grinding not permitted.
722.10.1 CCV: Minimum combustion chamber volume when mounted on engine @ TDC is 26.5 cc’s. Head gasket required, but thickness is non-tech and can be either steel or aluminum. Measurement to be checked at TDC with LAD Tool and must be plum front to back and side to side before submitting fluid.
722.10.2 Head Gasket: Head gasket required, but thickness is non-tech and can be fiber, steel or aluminum. 2 gaskets permitted, to maintain a minimum 26.5cc chamber volume. Sealer may be used on head gasket.
722.10.3 Valve Depth Check: Depth check between the valves in any direction cannot vary more than 0.005”
722.10.4 Valve Seats: Valve seats are of 3 angles, 45 degree face angle with top relief of 30 degrees and bottom relief of 60 degrees. Outside face of valve seat cannot be below floor of combustion chamber.
722.10.5 Inside Diameter of valve seats: Intake = 0.897” maximum, Exhaust = 0.862” maximum .
722.11 Valves: Steel or Stainless steel valves with 45 degree seat angle only are acceptable. No lightening, polishing, grinding or other alterations are allowed. Only OEM or Nitrated Valves are allowed in this class. Upper seals optional, seals may be used on both intake and exhaust, lash cap on exhaust valve only.
7188.8.131.52 Intake Outside Diameter: 0.980” minimum,
7184.108.40.206 Exhaust Outside Diameter: 0.940” minimum,
7220.127.116.11 Stem Diameter: 0.213” minimum
718.104.22.168 Weight: 21 grams minimum
722.12 Valve Springs: Springs must be made of a magnetic material. Number of coils: 4
722.214.171.124 Maximum Length: 1.250”
7126.96.36.199 Maximum Outside Diameter: 0.790”
7188.8.131.52 Maximum Inside Diameter: 0.650”
7184.108.40.206 Maximum Coil Diameter: 0.0715”,
7220.127.116.11 Installed Height: 0.815”. Spring shims allowed but must maintain 0.815” installed height,
718.104.22.168 Maximum spring pressure: 10.8 lbs. at .850” and 18 lbs. at .650”
722.214.171.124 Intake Retainer: Minimum thickness 0.225”
7126.96.36.199 Exhaust Retainer: Minimum thickness 0.245”
722.13 Rocker Arms: OEM 1:1 ratio steel rocker arms only. Must be OEM rockers.
722.14 Lifters: OEM lifters only
722.15 Camshaft: Stock appearing camshaft cores only with the ez-spin assembly unaltered and in stock condition.
722.15.1 Cam lobe base circle diameter: 0.860” - 0.875” (taken from pushrod)
722.15.2 Duration (taken from pushrod):
7188.8.131.52 Intake: 217 - 222 degrees at 0.050” lift, 84/88 degrees at 0.200 lift
7184.108.40.206 Exhaust: 220 – 224 degrees at 0.050” lift, 95/99 degrees at 0.200 lift
7220.127.116.11 Intake lift at pushrod: 0.215” - 0.225”
718.104.22.168 Exhaust lift at pushrod: 0.222” - 0.232”
722.214.171.124 Intake lift at retainer: 0.238” maximum
7126.96.36.199 Exhaust lift at retainer: 0.242” maximum
NOTE: Lift is measured off top of retainer at zero lash.
722.16 Timing Gear: OEM factory timing gear mandatory and must be installed in original location.
722.17 Ignition Coil: Ignition coil must be OEM for all classes, timing is non tech
722.18 Flywheel: Flywheel must be a minimum weight 3.3 lbs. No modification or removal of fins is allowed.
722.18.1 Legal Flywheels:
7188.8.131.52 Raceseng RSP-13-075 & 077 Rev Wheel F-S1
7184.108.40.206 ARC-6618 and ARC-6619
7220.127.116.11 DYNO PVL Boxstock Flywheel
718.104.22.168 King Wheel Billet Steel DJ-168F-16200-A
722.214.171.124 King Billet Aluminum Slipstream
722.19 Exhaust: Multi-stage pipes allowed. Looped pipes (360 degree turns) are not allowed. Pipe (including silencer) cannot extend past rear bumper. Header wrap required for safety reasons. Gasket and/or silicone allowed to seal header pipe to head. Allen bolts permitted on header to head. Pipes must be double nutted or safety wired on at least one stud or bolt
722.19.1 Maximum length: 24” measured thru the inside of the pipe with .250 wide tape measure. Remove silencer and pull tape measure tight, if any portion of the length of the pipe is below 24” – pipe is legal.
722.19.2 Silencer: RLV 4104.or RLV B91 is mandatory with all baffle plates inside and as supplied by manufacturer. Baffle holes .1285” max. Silencer must be supported by clamped on brace.
722.20 Starter: Pull starter must be present and remain stock, angle of installation is non tech. Color and finish of blower housing, valve cover and all sheet metal is non tech.
722.21 Oil Catch Can: Engine oil recovery system required
Section 850.2 4 Cycle Sprint Regional Classes
Delete: Masters Class