Snydersville Raceway  ♦  Track Office 610-381-3787  ♦  Track Hotline 570-424-2373 (Fridays After 3:00 PM)

 

Microstock Rules

• ROLL CAGE REQUIREMENTS

• All cars must have a minimum of a 4 down-tube main cage made with a minimum of .065 inch wall thickness, 1 inch round steel tubing welded to the main frame.  The top of the main cage must complete a hoop with a minimum opening of 16 inch.  Gussets are mandatory at all welded joints on the main cage.

• Side protection bars are mandatory, a minimum of two on each side and made with a minimum .065 inch wall thickness, 1/2 inch steel round or square steel tubing positioned so they will not allow side entry into the cockpit.

• A rear lateral bar connecting the two rear down tubes is mandatory and should be mounted approximately shoulder height.  The rear lateral bar must be made with a minimum .065 inch wall thickness, 3/4 inch steel round or square tubing.  Cars must have at least two bars positioned above and outside the driver's legs, with one on each side on a plane with the main lower frame rails and made of a minimum of .065 inch wall thickness, 3/4 inch rounded or square tubing.

• MAIN FRAME

• The main frame must be made out of a minimum .065 inch wall thickness, 1 inch round or square tubing.  Minimum frame must be of un-sprung design.  Spindles and axles must be securely mounted, bolted or welded to the frame.

• FLOOR PAN AND FIREWALL

• All cars must have a minimum .039 inch thick metal firewall completely shielding the driver from the fuel source and engine.  All cars must have a floor pan that completely shields the driver from the ground and made of a minimum of .030 inch metal or .050 inch fiberglass or similar material. 

• EXHAUST SYSTEM

• The exhaust system cannot extend past the rear bumper more than 3 inches but must extend outside the body. 

• BODIES

• ♦ Aluminum, fiberglass or similar materials allowed.  No steel bodies.

• ♦ Must resemble a dirt modified stock car or a traditional sedan or coupe style body.

• ♦ No sharp corners or points.

• ♦ Window openings must be large enough for emergency access to driver.

• ♦ Must have a closed roof with  a latch that can be opened from both inside and out.

• ♦ Must have a windshield of either metal mesh with minimum openings of 1/2 inch or clear polycarbonate with a minimum thickness of 1/8 inch. 

• ♦ No external wings allowed.

• ♦ Any bars within reach of the driver's helmet must be padded.

• ♦ Engines must be covered by appropriate bodywork.

• BUMPERS

• All cars must have front and rear bumpers.  Bumpers will be made with a minimum of 0.65 inch wall thickness, 3/4 inch steel round or square tubing, or a minimum .100 wall thickness 1 inch round aluminum tubing.  Bumpers must be 2 to 5 inches from the ground to the bottom of the lowest rail and at least 6 inches from the bottom of the lowest rail to the top of the highest rail.  They must have a minimum of 3 connecting bars and at least one must be in the center of the bumper.  All bumper ends must have looped or boxed ends and must be of double rail design.  The rear bumper must cover at least from center to center of the rear tires but cannot extend past the outer edge of the rear tire/wheel combination.  The front bumper must be a minimum of 15 inches and a maximum of 24 inches wide centered between the main frame rails where they attach to the front of the main frame.

• NERF BARS

• Nerf bars (or rub rails) are mandatory on all cars.  They must be made of a minimum .065 inch wall thickness, 3/4 inch round or square tubing or a minimum of .100 inch wall thickness, 1 inch aluminum tubing and extend to within 8 inches of the front tires and 4 inches of the rear tires.  Double rail Nerf bars are mandatory or single rail minimum of .065 inch wall thickness, 3/4 inch round or square tubing or minimum of .100 inch wall thickness, 1 inch aluminum tubing with an under rider bar of solid material minimum 3/4 inch welded to the bottom of the rail. 

• Nerf bars must be within 2 inches of, but cannot extend beyond the plane defined by the outside edge of the front and rear tire/wheel combination.

• HEADREST

• All cars without an integrated high back seat must have a headrest centered behind the driver's head with a minimum size of 4 inches x 4 inches and with a 2 inch thick padded.  Cars with a high back seat, racing style seat may use that manufacturers seat padding where the helmet meets the seat, or that same area must be padded with a minimum of a 1 inch thick pad. 

• SEATS

• Seats must be mounted at four mounting points connecting to the main frame or cage with minimum hardware of 5/16 inch bolts and load spreading washers.

• REAR AXLE AND HUBS

• Rear axles must of one-piece design.  No two-piece axles allowed.  Both rear hubs must be solidly mounted to the rear axle.  No split hubs. 

• BRAKE SYSTEMS

• Foot pedal operated brakes are mandatory.  Hydraulic or mechanical disc brakes only.  Front brakes are allowed but must work off of a separate master cylinder than the rear brake.

• STEERING

• ♦ All cars must have direct mechanical steering.

• ♦ All front axles must be mounted rigidly by welding or clamping.

• ♦ All tie rod ends (also known as heim or spherical rod bearings) must be of universal type swivel joint design. 

• ♦ All universal joint type steering systems must be welded except where they mount to a rack.

• ♦ No threaded rod type tie rods allowed.  Tie rods must be made of a minimum of 5/16 inch solid steel rods with threaded ends or aluminum type with a minimum of 1/2 inch. 

• CATCH CANS

• All cars are required to have a catch can.  They must be mounted within the body structure and be connected to the valve chamber cover or venting system as to not allow oil blow-by leak on to the track.  Catch can may be metal or plastic.

• MISCELLANEOUS

• ♦ No mirrors or radios allowed in carts.

• ♦ After market pump style fuel caps are allowed, but cannot be designed to be used by driver while the race car is in motion.  If stock fuel caps are used, they must remain stock, per WKA rules.  All fuel caps are subject to tech at any time.

• ♦  Microstocks must be numbered for scoring purposes. 

• ♦  Minimum number sizes are as follows, but larger sizes are recommended.

 

 

 

 

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• SEAT RULES

• Must be high back seat made of aluminum, fiberglass or plastic and designed for racing.

• REMOTE FUEL TANKS

• Plastic or aluminum kart racing type fuel tanks will be allowed.  They can be mounted under the steering shaft or in the tail in a safe manner and must vent outside the driver's compartment.  All fuel line connections must safely be wrapped.  Rollover valves are recommended.

Microstock  Motor and Chassis Rules

• The 2008 WKA Technical Manual is used as a guideline for the motor rules unless otherwise stated.  All Microstock engine rules are WKA stock Briggs & Stratton engine rules as specified in section 701 in the WKA Rule Book unless otherwise noted.

• CHASSIS RULES/DIMENSIONS

 

 

 

 

 

 

 

 

 

 

The rest of the kart will be teched as described in the 2009 WKA Rule Book.

 

Left Side	10 Inches
Right Side	10 Inches
Rear	6 Inches
Roof	10 Inches - Readable from right side

	Minimum	Maximum	Notes
Height	32"	42"	Measured from ground to highest point
Width	37"	48"	Measured at widest point, outside to outside
Length	78"	92"	Not including Muffler
Wheelbase	67"		With front wheels facing straight forward
Weight	200 lbs.		After Race / No Driver