OMSK Rules - 2018 Season
(Click here to download the rules in PDF format)
1. Chassis + Cage:
Cage size is 1.250" min @ 0.70" wall thickness min. Must be mild steel, Chrome Molley or DOH tubing. See diagram at bottom of page for for information on chassis. The thickness will be checked. Tubing thickness will be checked.
2. Wheel Base:
Wheel base can not be any shorter or longer than 54" (+ or -) an inch. The track width cannot be any wider than 63" MAX outside of tire to outside of tire, or outside of body.
3. Body:
Must not exceed maximum width of 63". Top of roof minimum height 42". Minimum length 102". No modified bodies allowed. Must have full fenders and nose piece. Topless carts are allowed
4. Bumpers:
Bumpers max O.D. will be 1.25" @ 0.70" wall thickness. They cannot be any wider than 62" and must be turned into the frame or capped with clean edges. Bumpers outside the nose and tail pieces must be O.D. 1-1/4 @ 0.70 wall thickness max and cannot be any wider than 36" MAX, these must be capped and with clean edges. Front and back bumpers must be 12" min. off the frame.
5. Wheels:
Any 8" O.D. Wheels allowed, steel or aluminum. Bead locks are allowed on all four corners, Bead locks are not mandatory. 4 on 4 bolt pattern wheels.
6. Tires:
Any 8" O.D. max tread tires are allowed, no slicks. No prepping of tires allowed. Grooving and siping are allowed. No turf tired allowed.
7. Hubs:
Any 4 on 4 Hub allowed front and rear
8. Brakes:
Brakes allowed on rear axle only. NO FRONT BRAKES
9. Front Suspension:
Shocks, Coil-overs or Micro Suspension ALLOWED.
10. Steering:
Any flat kart steering allowed. Rack and pinion steering allowed. Steering quickener allowed.
11. Fuel:
110 Octane Max in all classes. No performance Additives or Nitro. Fragrances are allowed.
12. Rear Axle:
Any 1.250” rear axle allowed. Axle must be solidly mounted with bearing cassettes and hangers welded to chassis. Or QRC mounts welded to the frame.
13. Windshield bars:
Must be minimum of (3) 3/8” bars in front of drives face.
14. Fuel System:
5-8: stock predator carb or adjustable tuned carb with 21mm venturi 27mm throttle plate from Vegas Carts only!
9-15: stock predator carb or adjustable tuned carb with 21mm venturi 27mm throttle plate from Vegas Carts only!
16 & up: stock predator carb or adjustable tuned carb with 21mm venturi 27mm throttle plate or 24mm venturi 27mm throttle plate. Carbs from Vegas Carts only!
NO ALTERNATING CARBURATOR OR GASKETS!!!!
15. Headers:
Any header allowed. Header must stay inside of body.
16. Weight:
5-8 yr. old class – Minimum weight 550lbs.
9-15 yr. old class – Minimum weight 650lbs
16 & up class – Minimum weight 750lbs
All Karts must have minimum weight posted on driver side A-pillar. All weights must be securely mounted with kart number or name.
17. Safety:
See class rules for each age group for engine specifications and guidelines.
Engine must be mounted to the right of driver.
18. Engines:
400 EX or lower on engine size.
Engine must be mounted to the right of driver.
19. Clutches:
Any Drum Style Clutch Allowed.
20. Kids 5-8:
550lbs Minimum weight.
Gear ration must be no lower than 650 final drive.
¾” restrictor plate must be installed in Carb.
Any Drum style shoe clutch allowed.
Engine must be box stock predator 420cc from Harbor Freight.
Governor may be removed.
4” aftermarket air filter and adapter allowed.
No elbow or extension tubes.
35# valve springs ok must retain stock height and diameter.
21. Kids 9-15:
650lbs Minimum weight.
Gear ratio non-tech.
Any Drum style shoe clutch allowed.
Engine must be box stock predator 420cc from Harbor Freight.
Governor may be removed.
4” aftermarket air filter and adapter allowed.
No elbow or extension tubes.
35# valve springs ok must retain stock height and diameter.
22. All Kids:
$10.00 entry fee. 80% payout for top 3 and winner gets trophy.
23. Adults 16 & up:
750lbs Minimum weight.
Gear ratio non-tech.
Any Drum style shoe clutch allowed.
Engine option 1: must be box stock predator 420cc from Harbor Freight. Motor must remain stock other than removing governor and 35# HD valve springs. Valve Springs must retain stock height and diameter.
Engine option 2: 460cc 25hp engine from Vegascarts.com must remain sealed from Vegas carts. No-internal modifications.
4” aftermarket air filter and adapter allowed.
No elbow or extension tubes.
Flywheel may be upgraded to Vegas carts part# ARC6622 billet flywheel.
24. Adults 16 & up:
$20.00 entry fee. 80% payout for top 3 and winner gets trophy.
25. Engine Claim Rule #1:
$600 engine claim. Only bare long block goes with claim.
Clutch, chain guard, air filter and adapter, top plate, fuel pump, header and muffler, starter nut and aftermarket flywheel DOES NOT GO WITH CLAIM!! You are only allowed to claim 2 engines per season. If the person being claimed decides to swap engines, you may only swap Vegas for Vegas and predator for predator. If the person putting up claim refuses to swap, then they will lose their points and money for the night resulting in a DQ. Person doing the claiming must pull into tech area and give money to the scale man before the next A feature is complete. (DO NOT WAIT FOR THE RACES TO BE FINISHED FOR THE NIGHT) If you are black-flagged, you are not eligible to claim that night. Claimant must finish race to claim.
26. Points:
To run for points, you must pay $20.00 registration fee.
Registration fee to be paid to O.M.S.K. Promoter.
27. Protest:
Protest and engine claim must be performed before the next A feature is completed and this rule book must be presented.
DO NOT INTERPRET THESE RULES YOURSELF. IF YOU HAVE ANY QUESTIONS CONTACT DEE RUSSELL @918-685-0994
