Find more about Weather in Owosso, MI

Owosso Kart Speedway - OKS

Visit The Offical OKS Mechandise Shop

Race Day Forecast

Track Status

Green Flag Racing

Winners August 6, 2013
Recent AnnouncementsSee All Announcements
Rain Make Up Date
Friday September 8th & 15th Gates open at 4pm, Practice at 6:30pm And Racing at 8pm!
Posted: Aug 28, 2017
Read Full Announcement
Race 5/19/17 Canceled

We are canceling tonight's race 5/19/17 due to chance of rain

Posted: May 19, 2017
Read Full Announcement
April 28th Kart Race Season Opener

Kart race season opener Friday April 28th. Gates open 4pm, Practice 6:30pm and Racing 8pm. $6 general admission, $18 family rate up to 4 people or $12 pit passes. Come out to OMP for a family fun night of racing.

Posted: Apr 25, 2017
Read Full Announcement

Clone Jr.

Ages 12-15

Min. weight 300 lbs.

Restricted with a .550 plate.

AKRA B.S Rules Stock Muffler Only

TECH. only class

AKRA BS rules. Gas only, open pipe and clutch rule.

Rules:

1.  Kart and safety equipment must have passed safety inspection before taking to the track.  We reserve the right to disallow any kart from competition if officials determine it is not safe to race.

2.  Must run a disc or drum style clutch.  No axle clutches.

3.  May run any gear ratio.

4.  Must abide by track safety rules, including safety equipment required.  All other published track rules and regulations will be enforced.

5.  No performance enhancing fuel or oil additives are allowed.

6.  Fire resistant, full racing suits are highly recommended.

Clone Masters

Age 15 and up
Min Weight 360lbs

Motor rules are AKRA BS rules. Gas only open pipe and clutch rule.

AKRA B.S Rules Stock Muffler only

Tech. only class

Rules:

1.  Kart and safety equipment must have passed safety inspection before taking to the track.  We reserve the right to disallow any kart from competition if officials determine it is not safe to race.

2.  Must run a disc or drum style clutch.  No axle clutches.

3.  May run any gear ratio.

4.  Must abide by track safety rules, including safety equipment required.  All other published track rules and regulations will be enforced.

5.  No performance enhancing fuel or oil additives are allowed.

6.  Fire resistant, full racing suits are highly recommended.

Clone Purple Plate

Ages 8-11

Min weight 250 lb.

Restricter Plate .500

2013 AKRA BS Rules . Gas only with winnie pipe and 14 tooth driver clutch rule.

Tech. only class

Rules:

1.  Kart and safety equipment must have passed safety inspection before taking to the track.  We reserve the right to disallow any kart from competition if officials determine it is not safe to race.

2.  Must run a disc or drum style clutch.  No axle clutches.

3.  May run any gear ratio.

4.  Must abide by track safety rules, including safety equipment required.  All other published track rules and regulations will be enforced.

5.  No performance enhancing fuel or oil additives are allowed.

6.  Fire resistant, full racing suits are highly recommended.

Gold Plate Alc

Ages 12-15
Min weight- FH 280lbs- AN 300lbs
Restrictor plate spec- AN .505 single hole FH .575 singal hole

WKA Rules Stock Muffler Only!

Rules:

1.  Kart and safety equipment must have passed safety inspection before taking to the track.  We reserve the right to disallow any kart from competition if officials determine it is not safe to race.

2.  Must run a disc or drum style clutch.  No axle clutches.

3.  May run any gear ratio.

4.  Must abide by track safety rules, including safety equipment required.  All other published track rules and regulations will be enforced.

5.  No performance enhancing fuel or oil additives are allowed.

6.  Fire resistant, full racing suits are highly recommended.

Jr. Champ Kart

Rules:

1.  Karts shall be a "Champ car type" with full cage and body.  Wheelbase 42'' min., 45'' max.

2.  Kart and safety equipment must have passed safety inspection before taking to the track.  We reserve the right to disallow any kart from competition if officials determine it is not safe to race.

3.  Drivers ages 11-15 **If you are 11 years of age, you must have at least one year of racing history.  Those without may run in the Rookie Champ class.

4.  Kart and driver  weight FH 340# Animal 360#  after all heat and feature races. 

5.  Must run Flathead Unrestricted or Animal  Gold Plate 3 hole .312

6.  Same engine rules as Senior Champ.

7.  Must run a disc or drum style clutch.  No axle clutches.

8.  May run any gear ratio.

9.  Must abide by track safety rules, including safety equipment required.  All other published trach rules and regulations will be enforced in this racing class.

10.  No performance enhancing fuel or oil additives are allowed.

11.  Karts must have a 5-point racing harness securely mounted to the frame.

12.  Fire resistant full racing suits are highly recommended.

Jr. Sportsman Champ

Rules:

1.  Karts shall be a "Champ car type" with full cage and body.  Wheelbase 42'' min., 45'' max.

2.  Kart and safety equipment must have passed safety inspection before taking to the track.  We reserve the right to disallow any kart from competition if officials determine it is not safe to race.

3.  Drivers ages 7-12

4.  Kart and driver must weight FH 300# Animal 310#. after all heat and feature races. 

5.  Must run Flathead and Animal on a Blue Plate.

6.  7.  Must run a disc or drum style clutch.  No axle clutches.

8.  May run any gear ratio.

9.  Must abide by track safety rules, including safety equipment required.  All other published trach rules and regulations will be enforced in this racing class.

10.  No performance enhancing fuel or oil additives are allowed.

11.  Karts must have a 5-point racing harness securely mounted to the frame.

12.  Fire resistant full racing suits are highly recommended.

Modified Champ

FH 390

Animal 410

Open

Ages 15 and up
Min weight rules are same as Unlimited All Stars Policies. Go to unlimited All Stars LLC 2017 Rules and Policies and read page 6.

Rotary valve or Reed valve Two-Stroke Cycle Engines

1. Single Cylinder Small Displacement 2-Cycle Engines

  • Maximum displacement 199cc
  • Minimum weight 200 lb. plus one pound per cc or fraction of a cc.

2. Single Cylinder Large Displacement 2-Cycle Engines

  • 200cc to maximum of 275cc maximum displacement allowed.
  • 200cc to 255cc minimum weight is 400 lbs.
  • 256cc to 275cc minimum weight is 430 lbs.

3. Multiple Engine 2-Stroke (No common crankcase multiple cylinder engine.)

  • For engine combinations up to 229cc the minimum weight is 200 lbs. plus one pound per cc or fraction of a cc.
  • For engine combinations 230cc to 275cc the minimum weight is 430 lbs.

Flat Head Four-Stroke cycle Engine

1. 190 lbs. plus one pound for every 3cc or fraction of a cc. multiple engines or cylinders are permissible.

2. 500cc maximum total displacement with a tolerance of 10cc when checked

Piston Port Two-Stroke Cycle Engine

1. 130 lbs. plus one pound for each cc or fraction of a cc.

2. Multiple engines or cylinders are Permissible

Overhead Cam (SOHC or DOHC) Four-Stroke Cycle Engine

1. Overhead cam engine or engines, multiple cylinders permitted. 500cc maximum displacement +/- 10cc when checked.

2. Minimum weight as follows; 205 lbs. plus 1 lb. for every 2 cc’s or fraction of a cc. Any engine or combination of engines from 450cc to 500cc are capped at a minimum weight of 430 lbs. unless power adders are used.

Overhead valve (OHV-Push Rod) Four-Stroke cycle Engine

1. 200 lbs. plus one pound for every 2.5cc or fraction of a cc. multiple engines or cylinders are permissible, 500cc maximum total displacement with a tolerance of 10cc when checked.


 

Rules:

1.  Kart and safety equipment must have passed safety inspection before taking to the track.  We reserve the right to disallow any kart from competition if officials determine it is not safe to race.

2.  Can run both drum or axle clutchs

3.  May run any gear ratio.

4.  Must abide by track safety rules, including safety equipment required.  All other published track rules and regulations will be enforced.

5.  No performance enhancing fuel or oil additives are allowed.

6.  Fire resistant, full racing suits are highly recommended.

7. All motors must have a muffler.

 

Purple Plate Experienced

Ages 7-11
Min weight- FH 250lbs- AN 250lbs
Restrictor plate spec. AN- 3 Hole purple .225

Restricter plate spec. FH- .425 purple plate

WKA Rules Stock Muffler Only!

Rules:

1.  Kart and safety equipment must have passed safety inspection before taking to the track.  We reserve the right to disallow any kart from competition if officials determine it is not safe to race.

2.  Must run a disc or drum style clutch.  No axle clutches.

3.  May run any gear ratio.

4.  Must abide by track safety rules, including safety equipment required.  All other published track rules and regulations will be enforced.

5.  No performance enhancing fuel or oil additives are allowed.

6.  Fire resistant, full racing suits are highly recommended.

Purple Plate Novice

Ages 6-10
Min weight- FH 250lbs -AN 250lbs
Restrictor plate spec.- AN 3 Hole .225 FH.425 singal hole

WKA Rules Stock Muffler Only

 

Rules:

1.  Kart and safety equipment must have passed safety inspection before taking to the track.  We reserve the right to disallow any kart from competition if officials determine it is not safe to race.

2.  Must run a disc or drum style clutch.  No axle clutches.

3.  May run any gear ratio.

4.  Must abide by track safety rules, including safety equipment required.  All other published track rules and regulations will be enforced.

5.  No performance enhancing fuel or oil additives are allowed.

6.  Fire resistant, full racing suits are highly recommended.



Rookie Clone

Age 5-10

Min. Weight #250

Restricter Plate RED .375

2013 AKRA BS Rules, Gas only, winnie pipe and open clutch with 14 tooth driver .

Senior Stock 35+

Age 35+
Animal Min Weight 410lb ALC.
FlatHead Min Weight 385lb Gas or ALC.
Clones min weight 405lb must be on gas (AKRA BS rules)

Rules:

1.  Kart and safety equipment must have passed safety inspection before taking to the track.  We reserve the right to disallow any kart from competition if officials determine it is not safe to race.

2.  Must run a disc or drum style clutch.  No axle clutches.

3.  May run any gear ratio.

4.  Must abide by track safety rules, including safety equipment required.  All other published track rules and regulations will be enforced.

5.  No performance enhancing fuel or oil additives are allowed.

6.  Fire resistant, full racing suits are highly recommended.

Sr. Champ Kart

Rules:

1.  Karts shall be a "Champ car type" with full cage and body.  Wheelbase 42'' min., 45'' max.

2.  Ages 15 and up

3.  Kart and safety equipment must have passed safety inspection before taking to the track.  We reserve the right to disallow any kart from competition if officials determine it is not safe to race.

4.  Kart and driver weight FH 390# Animal 410# after all heat and feature races.

5.  Must run a Flathead "Unrestricted" or Animal .312 3-hole Gold Plate.

6.  Must run a disc or drum style clutch.  No axle clutches.

7.  May run any gear ratio.

8.  Must abide by track safety rules, including safety equipment required.  All other published trach rules and regulations will be enforced in this class.

9.  No performance enhancing fuel or oil additives are allowed.

10.  Karts must have a 5-point racing harness securely mounted to the frame.

11.  Fire resistant full racing suits are highly recommended.

Stock Animal Alc

Age 15 and up
Min Weight 360lbs

Rules:

1.  Kart and safety equipment must have passed safety inspection before taking to the track.  We reserve the right to disallow any kart from competition if officials determine it is not safe to race.

2.  Must run a disc or drum style clutch.  No axle clutches.

3.  May run any gear ratio.

4.  Must abide by track safety rules, including safety equipment required.  All other published track rules and regulations will be enforced.

5.  No performance enhancing fuel or oil additives are allowed.

6.  Fire resistant, full racing suits are highly recommended.

 

Stock Raptor Alc

Ages 15 and up
Min weight- 360lbs

WKA Rules!

Rules:

1.  Kart and safety equipment must have passed safety inspection before taking to the track.  We reserve the right to disallow any kart from competition if officials determine it is not safe to race.

2.  Must run a disc or drum style clutch.  No axle clutches.

3.  May run any gear ratio.

4.  Must abide by track safety rules, including safety equipment required.  All other published track rules and regulations will be enforced.

5.  No performance enhancing fuel or oil additives are allowed.

6.  Fire resistant, full racing suits are highly recommended.



Super Heavy

Age 15 and up

Animal #410

Flathead #385

Clone BS #405

Driver must weight 200lbs

You can run all of these motor on Gas or Methanol.