Kid Kart Rules - Update

In addition to the following WKA Rule Update, ODKS has implemented the following local rules - the local rules will be in effect during the 2007 season

 WKA Rule Update June 2006 - see WKA website www.worldkarting.com for illustrations.

* REPLACE THE ENTIRE KIDKART SECTION 900

ONTM89 WITH THE FOLLOWING INFORMATION*

901 KID KART PURPOSE:

NOTE: The intent of this class is to allow beginning

drivers ages five (5) through (7) seven (and their

parents) the opportunity to learn driving skills and

mechanical techniques. Although this class is offered

at some National events, it is not a National class. It is

intended to be a demonstration class. Tech is

optional, but every effort should be made to make

racing close so as to not discourage young

competitors. If event participant awards are given out

they must be of equal value. All participants are

“Winners”.

901.1 SAFETY: Karts must pass pre-race technical

inspection before being allowed on track.

901.1.1 CHEST PROTECTORS: Chest protectors

meeting SFI Specification 20.1 are mandatory for all

Kid Kart drivers.

901.1.2 DRIVERS’ MEETING: Kid Kart driver / parent

meeting will be held before event.

901.1.3 TRAINING EVENT FORMAT: Training event will

be of nine (9) lap duration. Event will be from a

standing start, two abreast. Line up will be by draw.

The training race will proceed under green, barring

the need for a yellow or red flag for three (3) laps.

The yellow flag will be displayed at the beginning of

the fourth (4th) lap. The field will proceed at reduced

speed, single file, and will maintain position for two

laps. The green flag will be displayed at the beginning

of the sixth (6th) lap. Green flag conditions will

prevail, barring the need for a yellow or red flag, for

four (4) laps. The training event will be white flagged

at the conclusion of lap eight (8) with the checkered

flag being given at the conclusion of the ninth (9th)

lap. Awards may be given out at the completion of

the event. All participants will proceed to the scale /

tech compound (or other designated area) for a

critique of the event. Official weigh-in is not

necessary but may be done for training purposes.

901.2 KID KART SPECIFICATIONS:

901.2.1 CHAIN GUARD: Chain guard is to completely

cover chain when viewed from above.

901.2.2 CHAIN & GEARING: Comer #219 chain, 10

tooth driver, 89 tooth rear sprocket.

901.2.3 CHASSIS DESIGN: No offset karts. Seat must

not be offset beyond outside edge of left frame rail.

901.2.4 WHEELBASE: Minimum 29 “, maximum 31”.

901.2.5 WIDTH: Front, maximum 40 “, as measured to

outside of rim / tire (no min.) Rear minimum 39“,

maximum 42” as measured to outside of rim / tire.

901.2.6 REAR BUMPER: continuous loop shaped with

vertical or angled bracing connecting upper and

lower loop rails. Bumper must protect rear tires.

901.2.7 STEERING HEIGHT: Maximum 20 “. Seat

height minimum 12 “.

901.2.8 BODYWORK: Side pods or double nerf bars

and nose cones are mandatory.

901.2.9 TIRES: Open Compound. Front size

4:50/4:60 x 5; Rear, 5:50 x 5 maximum rear tire

circumference, 33.75”.

901.2.10 WEIGHT: Official weigh in optional. Local

ruling dependent upon physical size of class

participants. Suggested weight 125 lbs. to 150 lbs.

901.3 ENGINE SPECIFICATIONS: Comer C-50 or C-

51. All engines are to remain stock, as supplied by

the manufacturer. No grinding or aftermarket

accessories (including fasteners) except as

specifically noted. The only changes permitted are

those that will promote equality among competitors

rather than increasing performance.

901.4 CLASS INTENT: Class intent is very clear.

Anyone found not in compliance with above rules,

(parents / guardians / pit crew) is subject to

disciplinary action. WKA recommends that 5 to 7

year old drivers not be disqualified.

NOTE: WKA recommends a Kid Kart director be

appointed at each event.

Effective immediately

903.3.1 CARBURETOR: Model SHA 14-12L Dell’Orto.

All parts must be “as cast.” 0. 475” No-go venturi. Jet

size: #54-#58. No repairs to broken carb bodies.

Stripped bolt holes may be repaired with thread

inserts or next size larger bolt may be installed.

Restrictor plate issued by WKA. Additional return

spring on carburetor or on foot pedal required for

safety.

903.3.2 AIR FILTER: Stock air filter with at least one

stock filter element. Flange inside diameter 57mm.

Filter base diameter 89mm. Filter top diameter

51mm. Filter length 102mm. Flange length 16mm.

Flange style centered. Filter must remain unmodified.

903.3.3 Combustion chamber: OEM shape. CC: 7.3

minimum using WKA Cylinder Head Volume Check

TM 49, Section 504. The cc measuring plug shall not

be used. Combustion chamber to remain as

manufactured. All threads are to be intact. If a

thread insert is used, it must be full length. Any

attempt to bypass the intent of this rule is illegal.

903.3.4 CYLINDER: Liner and aluminum cylinder “as

cast”. No grinding allowed at any time.

903.3.5 PORT HEIGHT CHECK: Install dial indicator

onto cylinder and zero. Insert 3mm rod, no longer

than 3.00” (76.3mm), approximately 0.25” (6mm) into

appropriate port. Rotate piston until gentle contact is

made. Release 3mm rod, it is to remain unsupported.

Read dial indicator. Exhaust: 1.200” minimum. Intake:

0.370” maximum

903.3.6 BASE GASKET: Must be in place, no maximum

thickness.

903.3.7 PISTON: Must be OEM and stock appearing.

Both skirts must be same length +/-0.015” both

sides. Minimum piston length from bottom of ring

land to bottom of piston is 1.210”.

903.3. 8 RINGS: Must be OEM rings, max. Gap

0.040”. Rings cannot fall through cylinder.

903.3.9 CRANK PIN AND WRIST PIN: OEM

903.3.10 MAIN BEARINGS: Brand is non-tech, but

must be of same size and type as OEM. Exception:

Dual row bearings are permitted. Ceramic ball

bearings or any type of exotic design bearings are not

permitted.

903.3.11 SEALS: Must be installed as OEM. Seal

brand is non-tech, but no attempt to reduce sealing

or drag is allowed. Evidence of a leaking seal is

grounds for disqualification.

903.3.12 IGNITION: Timing shall be checked with a

dial indicator as per published procedure. Flywheel

key must be in place and unaltered.

903.3.12.1 IGNITION QUICK CHECK: Remove flywheel

nut and visually check to ensure that key is in place.

903.3.12.2 COMPLETE IGNITION TIMING CHECK

PROCEDURE:

Remove spark plug.

Remove starter cover.

Install dial indicator in spark plug hole.

Set dial indicator to 0.0 at top dead center.

Rotate flywheel in anti clockwise rotation until the first

magnet is exposed to the left of the coil.

Observe mounting lug of coil. Note the bottom of the

lug is machined to match the curve of the flywheel.

The left hand edge of the lug (nearest to engine

center) is the edge which be used to determine

ignition timing.

Rotate the flywheel clockwise to align the right hand

edge of the magnet with the left hand of the mounting

lug and read dial indicator. Leading edge (RH) should

be between 0.050” and 0.060” Any dial indicator

reading outside these dimensions is illegal.

903.3.13 PLUG BOOT: Non-tech.

903.3.14 PLUG WIRE: OEM

903.3.15 SPARK PLUG: Plug brand is non-tech. Plug

reach to be OEM.

903.3.15 MUFFLER: OEM C50 or C51 only. Holes as

per illustration in WKA Tech Manual TM 89. One

OEM exhaust gasket. Bolts must be tight. If safety

wired, tech inspector must remove bolts. It is

recommended that a “sniffer” be used to determine

exhaust integrity. Among acceptable “sniffers” are

Robinair Model 14970 (low range), TIF Model 5500

and Snap-On Tools Model ACT5600.

903.3.16 CLUTCH: Clutch must be run as

manufactured. Shoes must have “Comer” name cast

into them. Shoes must be stock appearing; no

polishing or removal of material. Minimum allowed

width of shoes and assembly 0.065”. Shoe length

minimum is 2.500” chord measurement. Spring

maximum diameter 0.430 and 9 coils. Wire diameter

0.075” to 0.080”.

903.3.17 SHROUD: No taping of shroud allowed.

Replacement fasteners allowed.