Section 10 – Class Listings and Requirements

The PDF rulebook version can be found at: http://www.hrkc.com/rules

Reference the NKA Tech Manual and HRKC Rule Book Sections for general rules pertaining to multiple classes as follows:

 Tires – HRKC Section 1.1
 Fuel – HRKC Section 4.3
 Comer C51 engine – NKA Section 30.5
 B&S LO206 engine – NKA Section 40.6 & www.briggsracing.com/racing-engines/206 with the following exception to Briggs Racing rules for all classes:

ALL HRKC classes using the Briggs LO206 engine are now allowed the following in regards to Engine Rules Sections 34. (a.) (b.)
1) EXF5520 NEW part number (5506 old part number)
2) EXF5700 Animal/206 Pipe for Cage Kart
3) 5507
This change is to bring the part numbers inline with current production numbers used by RLV.

 B&S Flathead engine – NKA Section 40.3 and HRKC Section 4.12
 B&S Animal engine – NKA Section 40.5 and HRKC Section 4.12
 Clone engine – NKA Section 40.4
 HF Predator engine – HRKC Section 13
 KT 100 engine – NKA Section 30.2

Oval KartsClassAgeWeight
10.1Kid Karts (exhibition only, no points – may run oval and/or road course)
Reference HRKC Section 11
5-7150 lbs
10.2Novice Flat Kart (exhibition only, no points)
This class may not be run on a weekly basis and is reserved for
new competitors with little or no karting experience and is used
at the discretion of the race director.
Flathead engine, methanol, Purple plate, open gear rule
Animal engine, methanol, Purple plate, open gear rule
Clone engine, Gasoline, Red plate, small pipe, open gear rule
Predator engine, 15t driver gear, 68t rear gear
7-10265 lbs
10.3Amateur Flat Kart (exhibition, only, no points)
This class may not be run on a weekly basis and is reserved for
new competitors with little or no karting experience and is used
at the discretion of the race director.
Flathead engine, Blue plate, open gear rule
Animal engine, Blue plate, open gear rule
Clone engine, Purple plate, small pipe, open gear rule
Predator engine, 16t driver gear, 64t rear gear
10-14290 lbs
10.4Jr Sportsman 1 Flat Kart
No steering fairings permitted.
Flathead engine, methanol, Purple Plate, open gear
Animal engine, methanol, Purple Plate, open gear
Clone engine, gasoline, Red plate, small pipe, open gear
Predator engine, gasoline, 15t driver gear, 68t rear gear.
7-10265 lbs
10.5Jr Sportsman 2 Flat Kart
No steering fairings permitted.
Flathead or Animal engine, Blue plate, open gear
Clone engine, gasoline, Purple plate, small pipe, open gear.
Predator engine, gasoline, 16t driver gear, 64t rear gear
10-12290 lbs
10.6Jr Restricted Flat Kart
Flathead engine, methanol, Gold plate, open gear
Animal engine, methanol, Gold plate, open gear
Clone engine, gasoline, Blue plate, small pipe, open gear
Predator engine, gasoline, 17t driver gear, 60t rear gear
12-15320 lbs
10.7Junior Sportsman Champ (Jr Champ Kart)
Predator engine, gasoline, 16t driver gear, 60t rear gear.
Both Junior and Senior Champ Kart chassis are permitted.
7-14315 lbs
10.8Senior Champ Kart
Flathead engine, methanol, unrestricted, open gear
Animal engine, methanol, unrestricted, open gear
Clone engine, gasoline, unrestricted, big pipe, open gear
Predator engine, gasoline, open gear
15-Up425 lbs
10.9Powder Puff
Female Drivers only
Predator engine, gasoline, open gear
15-Up325 lbs
10.10Stock Medium Flat Kart
Flathead engine, methanol, unrestricted, open gear
Animal engine, methanol, unrestricted, open gear
Clone engine, gasoline, unrestricted, big pipe, open gear
15-Up350 lbs
10.11Stock Heavy Flat Kart
Flathead engine, methanol, unrestricted, open gear
Animal engine, methanol, unrestricted, open gear
Clone engine, gasoline, unrestricted, big pipe, open gear
15-Up375 lbs
10.12Stock Super Heavy Flat Kart
200lbs minimum driver weight (as raced)
Flathead engine, methanol, unrestricted, open gear
Animal engine, methanol, unrestricted, open gear
Clone engine, gasoline, unrestricted, big pipe, open gear
15-Up400 lbs
10.13Predator 375 Flat Kart
Predator engine, gasoline, open gear
15-Up375 lbs
10.14Predator 425 Flat Kart
200 lb. minimum driver weight (as raced)
Predator engine, gasoline, open gear
15-Up425 lbs
10.15HRKC Pro Wing Series (speedway)
Briggs and Stratton LO206 Engine, gasoline, unrestricted, open gear, open clutch. No axle clutches. Spec tires and additional rules per HRKC Section 12.
Refer to https://www.briggsracing.com/racing-engines/206
15-Up425 lbs

Road CourseClassAgeWeight
10.16Cadet
B&S LO206 with PZ Model 22 carburetor, Junior LO206 green
slide, RLV #5506, 5507 or 5511 exhausts, gasoline. Tires-Open
compound, max size 4.50-4.60 wide F/R.
7-12265 lbs
10.17Jr. Briggs
B&S LO206 with PZ Model 22 carburetor, Junior LO206 gold
slide, RLV #5506, 5507 or 5511 exhausts, gasoline. Tires-Open
compound, max size 4.50-4.60 Front, 7.10 Rear.
12-15310 lbs
10.18Senior 4-Cycle
B&S LO206 , gasoline, unrestricted, RLV #5506, 5507 or 5511 exhausts.
Predator engine, gasoline, open gear.
15-Up390 lbs
10.19Yamaha Junior
Yamaha KT-100 or Piston Port engine with a Walbro WB3A
carburetor, RLV-SSX-V #7548 (Can) exhaust
12-15320 lbs
10.20Open 4 Cycle
Any OEM 6.5 HP or less engine, gasoline
15-Up325 lbs
10.21Shifter/TAG (Touch and Go)
80cc or 125cc NKA legal kart engines.
Minimum weight, postrace for 80cc - 375 lbs., 125cc - 395 lbs.
Fixed open exhaust (no slippy pipes), 2-stroke
15-Up375/395 lbs
10.222 Cycle Yamaha/Piston Port
Yamaha KT-100 or Piston Port engine. Must be NKA legal. Fixed
open exhaust (no slippy pipes), 2-stroke
15-Up345 lbs

Note 1: If classes do not grow to 3 or more entries within 4 races they may be dropped or combined with another class and scored separately.
Note 2: Classes may be added, deleted, combined, or changed during the year, as demand requires.
Note 3: For any class that has a class sponsor, the sponsor’s decal must be displayed on the kart or the competitor will not be allowed to compete in the feature and will not receive points. This applies to HRKC members only.
Note 4: Novice and Amateur classes are not for drivers to remain in for extended periods of time. They are designed just for drivers with no previous experience to get familiar with their kart/kar and the race day procedures. HRKC recommends that drivers move up to their respective classes after a max of 6 races in the Novice or Amateur divisions. Exceptions to this rule must be discussed and granted by the HRKC Race Committee.
Note 5: All weights posted above are minimum weights post qualifying, Heat Race or Feature Race events. Weights are also subject to change, as determined by the HRKC Race Committee.