INFORMATION AND RULES
Pit Pass - $10
Entry Fee (including pit pass) - $20
Each additional class - $10
1/8 Mile DIRT Track
Squirts, Rookies, and Juniors must run a nose piece, side panels and full-width bumpers and may only run one class.
Drivers 17 years of age and under MUST have a signed parental waiver in order to race.
All karts must run rotor guards.
Flathead 5HP Briggs Motors ONLY.
WKA RULES APPLY when teching karts.
We have a section of bleachers and a concession stand in the General Admission area.
Squirt (trophy)
Rookie (trophy)
Junior Lite
Junior Heavy
Senior Lite
Senior Medium
Senior Heavy
Stock Project Sr. Lite
Stock Project Senior
Senior Super Heavy
Limited Mod
35 & Over
7-10
8-12
12-15
12-15
15 minimum
15 minimum
15 minimum
15 minimum
15 minimum
15 minimum
15 minimum
35 minimum
250 � Track-Supplied Restrictor
265 � Purple Restrictor .425
280 � Turquoise Restrictor .500
320 � Gold Restrictor .575
Maximum Kart Weight 200lbs
325
350
375
325
375
400 - Minimum driver weight 200lbs
375
375
- Trophy only
- 87 octane gas only
- Approved engine: BS Project 6.5 OHV only
- Stamped steel drum shoe type clutches (max torque and 12 tooth driver only)
- Stock muffler can be replaced with pipe that goes to the back of the kart
ENGINE SPECIFIC TECH SHEET FOR: BOX STOCK PROJECT 6.5 OVH
Description: Single cylinder, 2 valve, OHV 4 cycle
Important Note: All parts must be Box Stock Project factory production parts unless otherwise specified in this rules manual. No machining or alteration of parts is allowed unless specifically noted. All parts will be subject to a comparison to a know Box Stock part (when performing a comparison check it is recommended to use a + /- .005� tolerance). Engine will be teched as raced. There will also be a $200 claiming rule in place for this engine. Refusing to accept the claimer will result in immediate disqualification of competitor along with forfeiture of any points earned to date in class. Competitor will also not be allowed to compete any
longer in that class.
Combustion chamber volume: 27.5 cubic centimeter minimum, with piston at TDC, using prescribed procedure.
Cylinder Head Requirements: Must be OEM casting only. Porting and / or grinding are not permitted. Valve seats are two angles 45 degrees valve face and 30 degrees top relief. Stock head bolts only, must have four. Head gasket maybe after market, must be of stock configuration. No copper or aluminum gaskets allowed. Stock exhaust system only with no modifications. Any stock configuration gasket allowed no other sealer.
Bore and Stroke: Stock cylinder bore is 2.685� max. Stroke is 2.123� + / - .005�.
Carburetor requirements: Huayi model carb only. Carb to intake sealer is gasket only no other sealer allowed. Choke must be as supplied from factory, but may be fixed to stay in open position. Choke bore .810� NO-GO. Venturi .615� NO-GO. Rear carb bore .751� NO-GO. Main fuel jet .028� NO-GO. Stock air cleaner assembly only.
Valve Train: Stock valve cover only with any stock configuration gasket, no sealer. Factory stock rocker arms and push rods only. Stock valves only 45 degree angle only both valves, no modifications allowed. Only Box Stock valve springs only. Max wire diameter on spring wire is .698� with a maximum tension of 10.8 lbs. at a height of .850�.
Ignition system: Stock Box Stock system only and must be unaltered. Kill switch and low oil sensor may be disabled and removed.
Flywheel: Box Stock flywheel only with plastic fins. No alterations of any type allowed. Must also run stock flywheel key.
Piston and Rings: Must be unaltered Box Stock only. No machining of piston and rings allowed.
Connecting Rod: Stock Box Stock rod only. No machining of any type allowed. Stock rod bolts only.
Crankshaft Requirements: Stock Box Stock crankshaft required. Machining, polishing, addition of material or other alteration of crankshaft is prohibited. Stock factory timing gear mandatory and must be installed in original location. Crankshaft journal diameter is 1.180�- 1.175� min.
Camshaft Requirements: Stock as cast camshaft only. Maximum running lift of .245� checked at valve as run.
Block Requirements: Block must remain stock as produced. Stub for governor may be removed and hole plugged. No machining of block allowed. Welding to the block shall be for rod damage repair only and may not constitute a functional modification.
Rules taken from www.akrainc.com downloadable 2008 Rules & Regulations Book