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
 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

 ClassAgeWeight
10.1Kid Karts (exhibition only - oval and road course)
Reference HRKC Section 11
5-7150 lbs
10.2Novice Flat Kart (exhibition only)
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, Purple plate, open gear rule
Clone engine, Red plate, small pipe, open gear rule
Animal engine, Purple plate, open gear rule
Predator engine, 15t driver gear, 68t rear gear
7-10265 lbs
10.3Amateur Flat Kart (exhibition only)
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
Clone engine, Purple plate, small pipe, open gear rule
Animal engine, Blue plate, open gear rule
Predator engine, 16t driver gear, 64t rear gear
10-14290 lbs
10.4Jr Sportsman 1 (Junior 1 Flat kart) - Flathead
Flathead engine, methanol, Purple Plate, open gear
No steering fairings permitted.
7-10265 lbs
10.5Jr Sportsman 1 (Junior 1 Flat Kart) – Animal
Animal engine, methanol, Purple Plate, open gear
No steering fairings permitted.
7-10265 lbs
10.6Jr Sportsman 1 (Junior 1 Flat Kart) – Clone
Clone engine, gasoline, Red plate, small pipe, open gear
No steering fairings permitted.
7-10265 lbs
10.7Jr Sportsman 1 (Junior 1 Flat Kart) – Predator
Predator engine, gasoline, 15t driver gear, 68t rear gear.
No steering fairings permitted.
7-10265 lbs
10.8Jr Sportsman 2 (Junior 2 Flat kart) – Flathead/Animal
Flathead engine, methanol, Blue plate, open gear
No steering fairings permitted.
10-12290 lbs
10.9Jr Sportsman 2 (Junior 2 Flat Kart) – Clone
Clone engine, gasoline, Purple plate, small pipe, open gear. No
steering fairings permitted.
10-12290 lbs
10.10Jr Sportsman 2 (Junior 2 Flat Kart) – Predator
Predator engine, gasoline, 16t driver gear, 64t rear gear
No steering fairings permitted.
10-12290 lbs
10.11Jr Restricted (Junior 3 Flat kart) – Flathead
Flathead engine, methanol, Gold plate, open gear
12-15320 lbs
10.12Jr Restricted (Junior 3 Flat Kart) – Animal
Animal engine, methanol, Gold plate, open gear
12-15320 lbs
10.13Jr Restricted (Junior 3 Flat Kart) – Clone
Clone engine, gasoline, Blue plate, small pipe, open gear
12-15320 lbs
10.14Jr Restricted (Junior 3 Flat Kart) – Predator
Predator engine, gasoline, 17t driver gear, 60t rear gear
12-15320 lbs
10.15Powder Puff Predator
Predator engine, gasoline, open gear
15-Up325 lbs
10.16Stock Medium Flathead (Flat Kart)
Flathead engine, methanol, unrestricted, open gear
15-Up350 lbs
10.17Stock Medium Animal (Flat Kart)
Animal engine, methanol, unrestricted, open gear
15-Up350 lbs
10.18Stock Medium Clone (Flat Kart)
Clone engine, gasoline, unrestricted, big pipe, open gear
15-Up350 lbs
10.19Stock Heavy Flathead (Flat Kart)
Flathead engine, methanol, unrestricted, open gear
15-Up375 lbs
10.20Stock Heavy Animal (Flat Kart)
Animal engine, methanol, unrestricted, open gear
15-Up375 lbs
10.21Stock Heavy Clone (Flat Kart)
Clone engine, gasoline, unrestricted, big pipe, open gear
15-Up375 lbs
10.22Predator 375 (Flat Kart)
Predator engine, gasoline, open gear
15-Up375 lbs
10.23Stock Super Heavy Flathead (Flat Kart)
Flathead engine, methanol, unrestricted, open gear
200 lb. minimum driver weight (as raced)
15-Up400 lbs
10.24Stock Super Heavy Animal (Flat Kart)
Animal engine, methanol, unrestricted, open gear
200 lb. minimum driver weight (as raced)
15-Up400 lbs
10.25Stock Super Heavy Clone (Flat Kart)
Clone engine, gasoline, unrestricted, big pipe, open gear
200 lb. minimum driver weight (as raced)
15-Up400 lbs
10.26Predator 425 (Flat Kart)
Predator engine, gasoline, open gear
200 lb. minimum driver weight (as raced)
15-Up425 lbs
10.27Cadet (road course)
B&S LO206 with PZ Model 22 carburetor, Junior LO206 green
slide, RLV #5506, 5507 or 5511 exhausts, gasoline. Tires-Open
compound, size 10 X (4.50-4.60) X 5.
7-11265 lbs
10.28Yamaha Junior (road course)
Yamaha KT-100 or Piston Port engine with a Walbro WB3A
carburetor, RLV-SSX-V #7548 (Can) exhaust
12-15320 lbs
10.29Open 4 Cycle (road course)
Any OEM 6.5 HP or less engine, gasoline
15-Up325 lbs
10.30Shifter/TAG (Touch and Go) (road course)
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
10.312 Cycle Yamaha/Piston Port (road course)
Yamaha KT-100 or Piston Port engine. Must be NKA legal. Fixed
open exhaust (no slippy pipes), 2-stroke
15-Up345 lbs
10.32Junior Sportsman Champ (Jr Champ Kart)
Predator engine, gasoline, 16t driver gear, 60t rear gear
7-14330 lbs
10.33Senior Champ Kart – Flathead
Flathead engine, methanol, unrestricted, open gear
15-Up425 lbs
10.34Senior Champ Kart – Animal
Animal engine, methanol, unrestricted, open gear
15-Up425 lbs
10.35Senior Champ Kart – Clone
Clone engine, gasoline, unrestricted, big pipe, open gear
15-Up425 lbs
10.36Senior Champ Kart – Predator
Predator engine, gasoline, open gear
15-Up425 lbs
10.37HRKC Pro Wing Series (speedway)
Flathead engine, methanol, unrestricted, open gear. No axle
clutches. Spec tire per HRKC Section 12. Mirrors are optional.
Refer to NKA Tech Manual, Section 20.4
15-Up425 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. Weights are also subject to change, as determined by the HRKC Race Committee.
Note 3 Competitors who advance out of the Novice/Amateur or a junior class may not return to that class without special permission of the HRKC Race Committee.
Note 4 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 5 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 7 All weights posted above are minimum weights post qualifying, Heat Race or Feature Race events.
Note 8 Powder Puff is a class strictly for female drivers.