The only motors allowed in this class are FACTORY STOCK Briggs Animal OHV with the Horstman Black 3-hole .250" restrictor plate installed. This is a BOX STOCK CLASS ONLY. The ONLY Modifications / Alterations allowed are:

1.  May use fuel pump.
2.  May use any air cleaner assembly.
3.  May use any exhaust header.  Must have flared or washer end if exhaust protrudes outside frame.
4. Must use STOCK FACTORY CAM ONLY - no exceptions.

Notes: This is a stock engine class and if anything is altered or replaced other than what is listed above, it does not fit the mandated requirements.

Red Plate Animal
265lbs. / 6-8 Years of Age

1. This is a Restricted Stock Briggs & Stratton Animal class.  The only approved motor is the Briggs Animal OHV.
2. Must run  3-hole .279” Red Horstman restrictor plate.  Will be teched with .281" no/go. Restrictor must be mounted between Carburetor and Manifold.  Restrictor may not be altered in any way.  Must use gasket between restrictor and manifold.
3. May use any clutch (disc or drum)
4. The only legal camshaft for this class is the Stock Animal, AN001, AN002. No other camshaft is permitted.
 
Notes: This is a stock engine class and if anything is altered or replaced other than what is listed in the engine spec sheet it does not fit the mandated requirements.

Gold Plate Animal
285lbs. / 7-11 Years of Age

1. This is a Restricted Stock Briggs & Stratton Animal class.  The only approved motor is the Briggs Animal OHV.
2. Must run  3-hole .312” Gold Horstman restrictor plate.  Will be teched with .314" no/go.  Restrictor must be mounted between Carburetor and Manifold.  Restrictor may not be altered in any way.  Must use gasket between restrictor and manifold.
3. May use any clutch (disc or drum)
4. The only legal camshaft for this class is the Stock Animal, AN001, AN002. No other camshaft is permitted.
 
Notes: This is a stock engine class and if anything is altered or replaced other than what is listed in the engine spec sheet it does not fit the mandated requirements.

Local Option - LO206 Briggs sealed Animal

Age 8 to 12 yrs
Minimum weight #300

1. This is a Restricted Stock Briggs & Stratton Animal class.  The only approved motor is the Briggs Animal OHV LO206 crate motor.
2. Any disc or drum clutch. No Wet Clutches.

3. Engine tech will be performed under current year WKA tech rules.

4. Pump gasoline only. No performance enhancements or additives allowed. 
5. Factory seal must remain intact as it came from the factory. Any motor with a altered, missing, broken, or tampered seal will be disqualified for this class.
 
Stock Animal
330lbs. / 9-15 Years of Age

1. This is a stock Briggs & Stratton Animal Class.   The only approved motor is the Briggs Animal OHV.
2. May use any clutch (disc or drum)
3. The only legal camshafts for this class is the Stock Animal, AN001, AN002, or 255WL. No other camshaft is permitted.

Notes: This is a stock engine class and if anything is altered or replaced other than what is listed in the engine spec sheet it does not fit the mandated requirements.

Modified Animal
340lb. / 12 Years of Age Minimum
 
**Driver's must have (1) year experience in Stock Animal class and track approval before they will be allowed to run this class**

1. Piston, Rod, and Head are non-tech
2. Camshaft may not exceed .308" lift at pushrod.
3. Grinding, porting, decking, and polishing allowed.
4. Must use Billet Flywheel or Briggs PVL
5. Any carb.  Will be teched with .875" no/go.  Stock appearing animal carb ok.
6. May use any exhaust header.  Must have flared or washer end if exhaust protrudes outside frame.
7. Any clutch allowed.

Modified Adult

** By agreement of Racers in this class, as of 6/17/2011, the Adult Modified class will allow ANY 6.5hp, 4-stroke motor regardless of make as long as the rules below are adhered to **

435lb. min weight/ 18 + years of age (* EXCEPTIONS: Drivers under 18 years of age that wish to participate in this class must have parental approval, JSJJ Management approval, and have demonstrated an advanced ability to control their kart during racing in previous seasons at JSJJ Speedway.)

1. Piston, Rod, and Head are non-tech
2. Camshaft may not exceed .356" lift at pushrod.
3. Stock crankshaft  (Stock dimensions) No Stroker Motors allowed 
4. Grinding, porting, decking, and polishing allowed.
5. Billet Flywheel required
6. No Restriction on carburetor.
7. May use any exhaust header.  Must have flared or washer end if exhaust protrudes outside frame.
8. Any clutch allowed.
9. Steel scattershield required
10. Max overbore is .030