Engine/Chassis Regulations
1. All IKF engine and chassis rules apply as per IKF rulebook.
a. All 2 cycle classes must run a approved air box
2. OPTION AGE Year: IKF rules specify, During the year a driver’s Attained Age changes from one age group to another. The driver may race in either age group. Once the driver moves to the higher age group, they can no longer race in the lower age groupi. Allow the use of old cylinders ii. Allow the use of a clutch with 7000 rpm engagement or less
b. All 2 cycle classes must run a muffler min. 12” x 3” c. 4 cycle: Mufflers will be required for all 4 cycle classes.
i. Only the RLV B91 muffler will be allowed. It must be completely intact and in working order
ii. All exhaust systems are subject to safety, and tech inspection
iii. All mufflers and exhaust pipes must be safety wired
ii. All exhaust systems are subject to safety, and tech inspection
iii. All mufflers and exhaust pipes must be safety wired
B. CLASS STRUCTURE
1. KID KART : All Kid Karts will go through tech after second practice. This should not be confused with pre-race tech inspection as this is still required before entering the track for first practice.
a. AGE: 5* - 8 years old Option year applies.
c. WEIGHT: 150 lbs.
d. FUEL: pump gas/oil only.
e. CHASSIS: To be no longer than a cadet model, as per IKF.
2. JUNIOR I Novice:
i. * Attained age of 5 years old.
b. MOTOR: 50cc Comer C-50 no modifications allowed: per I.K.F. Rule 622.50 C-50 Piston Port (Kid Kart Engine) Exhibition Class with Rule 622.51.14 Air Filter: K&N #RC-1250 or equivalent. Filter must remain unmodified. Chain and Gearing per Rule 622.51.20 (Comer 10t clutch, 219 chain and 89t Rear Sprocket.)c. WEIGHT: 150 lbs.
d. FUEL: pump gas/oil only.
e. CHASSIS: To be no longer than a cadet model, as per IKF.
a. AGE: 8 – 12 years old. Option year applies. b. MOTOR: Briggs & Stratton 5hp. With .500 red restrictor.
3. JUNIOR I Expert:
i. WEIGHT: 235 lbs. ii. FUEL: Methanol only
c. MOTOR: Briggs Animal Sportsman with IKF restrictor.
i. WEIGHT: 240 lbs. ii. FUEL: Gas only
d. MOTOR: STOCK Honda OHV 6.5 Advanced Flywheel Key allowed..
i. WEIGHT: 240 lbs. ii. FUEL: Gas only
a. AGE: 8 – 12 years old. Option year applies.
b. MOTOR: Briggs & Stratton 5hp. With .500 red restrictor.
4. JUNIOR II:
b. MOTOR: Briggs & Stratton 5hp. With .500 red restrictor.
i. WEIGHT: 235 lbs. ii. FUEL: Methanol only
c. MOTOR: Briggs Animal Sportsman with IKF restrictor.
i. WEIGHT: 260 lbs. ii. FUEL: Gas only
d. MOTOR: STOCK Honda OHV 6.5 Advanced Flywheel Key allowed..
i. WEIGHT: 260 lbs. ii. FUEL: Gas only
a. AGE: 12 – 16 years old. Option year applies. b. MOTOR: Briggs & Stratton Flat Head 5hp.
5. SENIOR 4 CYCLE:
i. WEIGHT: 310 lbs. ii. FUEL: Methanol only
c. MOTOR: Honda OHV 6.5 Stock
i. WEIGHT: 310 lbs. ii. FUEL: Gas only.
d. MOTOR: Briggs Animal Stock
i. WEIGHT: 310 lbs. ii. FUEL: Gas only.
a. AGE: 16 and up b. MOTOR: Briggs & Stratton Flat Head 5hp.
6. World Formula Heavy as per IKF
i. WEIGHT: 350 lbs. ii. FUEL: Methanol only.
c. MOTOR: Tecumseh 5hp. H50
i. WEIGHT: 350/365 lbs. ii. FUEL: Gas/ Methanol only
d. MOTOR: Tecumseh 5.5 Stock OHV
i. WEIGHT: 350/360 lbs. ii. FUEL: Gas/ Methanol only
e. MOTOR: Honda OHV 6.5 Stock
i. WEIGHT: 350 lbs. ii. FUEL: Gas only
f. MOTOR: Briggs Super Sportsman Animal
i. WEIGHT: 350 lbs. ii. FUEL: Gas only.
a. Briggs WF b. Weight 390 lbs.
7. STAR:
a. AGE: 16 and up b. MOTOR: Tecumseh 10hp.
i. WEIGHT: 360 lbs. ii. 370 lbs. for speedway iii. FUEL: Methanol only.
8. FORMULA 80 JR.:
a. AGE: 13* - 15 Years old. Option year applies. b. Competition age 13 with minimum 1 year competition experience.
c. MOTOR: CR80, CR85, KX80, RM80, YZ80, TM80.
9. FORMULA 80:
c. MOTOR: CR80, CR85, KX80, RM80, YZ80, TM80.
i. WEIGHT: 320 lbs.
ii. FUEL: Gas/oil only.
iii. NO FRONT BRAKES ALLOWED
ii. FUEL: Gas/oil only.
iii. NO FRONT BRAKES ALLOWED
a. AGE: 16 and up. b. MOTOR: CR80, CR85, KX80, RM80, YZ80, TM80.
10. FORMULA 125:
i. WEIGHT: 360 lbs.
ii. FUEL: Gas/oil only.
iii. NO FRONT BRAKES ALLOWED
ii. FUEL: Gas/oil only.
iii. NO FRONT BRAKES ALLOWED
a. AGE: 16 and up.
b. MOTOR: CR125, KX125, RM125, YZ125, TM125MX, Approved ICC 125cc Engines.
11. ROTAX MAX 125:
b. MOTOR: CR125, KX125, RM125, YZ125, TM125MX, Approved ICC 125cc Engines.
i. WEIGHT: 385 lbs. ii. FUEL: Gas/oil only
a. AGE: 16 and up.
b. MOTOR: Rotax 125.
12. OPEN (SPEEDWAY ONLY):
b. MOTOR: Rotax 125.
i. Must have U.S. passport
ii. WEIGHT: 370 lbs.
iii. FUEL: Gas/oil only
iv. NO FRONT BRAKES ALLOWED
ii. WEIGHT: 370 lbs.
iii. FUEL: Gas/oil only
iv. NO FRONT BRAKES ALLOWED
a. AGE: 16 and up. b. MOTOR: Any 2 or 4 cycle listed IKF engine. No stock 5hp. Allowed.
i. WEIGHT: As per class listed.
ii. FUEL: 2 cycles gas/oil only. 4 cycle methanol only.
ii. FUEL: 2 cycles gas/oil only. 4 cycle methanol only.