PKRA Racing Classes

The following is a list of the current classes being raced at PKRA.

 
ClassAge Champ
Points?
EngineFuelSpec OilWeight
(lbs)
Spec TireRule Base
Kid Kart GX50 5-8     Honda GX50 
Comer C-51
VP110 N/A 160 **** Evinco Blue 'H' 4.6 Per HPD Rules ***.
Gear: F16:R89
Junior 1 LO206 7-11 Briggs LO206 VP110 N/A 235 Evinco Blue 'H' 4.6 Per IKF Rules. 
Blue slide required.
Junior 2 LO206 12-15  YES Briggs LO206 VP110 N/A 315* Evinco Blue 'H' 4.6/6.0 Per IKF Rules.
(Based on Briggs Rules)
Senior LO206 16+  YES Briggs LO206 VP110 N/A 370 Evinco Blue 'H' 4.6/6.0 Per IKF Rules.
(Based on Briggs Rules)
Masters LO206 ** 40+ Briggs LO206 VP110 N/A 370 Evinco Blue 'H' 4.6/6.0 Per IKF Rules, Except weight **
(Based on Briggs Rules)
World Formula Jr. II
"Limited" ***
12-15 Briggs World Formula Jr. VP110 N/A 325* Evinco Blue 'H' 4.6/6.0 Per IKF Rules, Except Blue Ignition and Optional Clutch ***
World Formula Medium
"Limited" ***
16+  YES Briggs World Formula VP110 N/A 365 Evinco Blue 'H' 4.6/6.0 Per IKF Rules. Except Blue Ignition and Optional Clutch ***
World Formula Masters
"Limited" ***
40+ Briggs World Formula VP110 N/A 400 Evinco Blue 'H' 4.6/6.0 Per IKF Rules. Except Blue Ignition and Optional Clutch ***
100cc TAG Junior 2 13-15   Air Cooled 100cc 2-Cycle, Restricted VP110 Motul Kart GP 2T  330 Evinco Blue 'H' 4.6/7.1 Per IKF and Engine Mfg Rules
Restricted Exhaust
    KA100 Jr 2 ***** 13-15       IAME KA100, Restricted VP110 Motul Kart GP 2T 330 Evinco Blue 'H' 4.6/7.1 Per IKF & SKUSA KA100 Rules.
22mm Exhaust
    VLR 100cc Jr 2 ***** 13-15       Vortex ROK VLR 100cc, Restricted VP110 Motul Kart GP 2T 330 Evinco Blue 'H' 4.6/7.1 Per IKF & Vortex Rules.
Restricted Exhaust
100cc TAG Senior 16+   Air Cooled 100cc 2-Cycle VP110 Motul Kart GP 2T 360 Evinco Blue 'H' 4.6/7.1 Per IKF and Engine Mfg Rules

    KA100 Sr ***** 16+       IAME KA100 VP110 Motul Kart GP 2T 360 Evinco Blue 'H' 4.6/7.1 Per IKF & SKUSA KA100 Rules.
 
    VLR 100cc ***** 16+       Vortex ROK VLR 100cc VP110 Motul Kart GP 2T 360 Evinco Blue 'H' 4.6/7.1 Per IKF & Vortex Rules.

TAG CADET 8-13   Mixed engines flexible     Evinco Blue 'H' 4.6 Per IKF TAG Cadet Rules
    Rotax Micro Max 7-10 Rotax Micro Rotax XPS Oil 235
    Rotax Mini Max 9-12 Rotax Mini Rotax XPS Oil 265
    SKUSA Micro Swift 7-10 IAME Mini Swift - Micro Swift Header Required   Motul Kart GP 2T 225  
    SKUSA Mini Swift 9-13 IAME Mini Swift   Motol Kart GP 2T 245
    Vortex Mini ROK 8-12   Vortex Mini ROK     245  
TAG Junior 13-15   Mixed engines flexible   320 Evinco Red 'M' 4.6/7.1 Per IKF TAG Junior Rules
    SKUSA X30 Junior 12-15 IAME X30 + 29mm factory exhaust restricor   Motul Kart GP 2T 320  
    Vortex ROK TT Jr. 12-15         320    
TAG Senior ***** 16+ Mixed Engines VP110 Motul Kart
GP 2T
370 Evinco Red 'M' or Blue 'H' 4.6/7.1 Per IKF TAG Senior Rules.
S2 15+ Honda CR125 VP C-12 Motul Kart
GP 2T
385 Evinco Red 'M' 4.6/7.1 Per SKUSA S2 Rules.
S4 30+ Honda CR125 VP C-12 Motul Kart
GP 2T
405 Evinco Red 'M' 4.6/7.1 Per SKUSA S4 Rules.
S5 12-15 Honda CR125 VP C-12 Motul Kart
GP 2T
340 Evinco Red 'M' 4.6/7.1 Per SKUSA S5 Rules.
 

** Masters LO206 is new for the Winter 2018 season.  This class will run intermixed with the LO206 Senior class, but have separate points.

*** World Formula "Limited" PKRA local classes allow running a Blue Ignition (12,000 RPM Rev Limiter - about $90) and allow any Drum/Can clutch (as with LO206 rules) starting with the Winter 2018 season.  PKRA had previously experienced some WF issues that are thought to be at least in part caused by the significant time on the stock rev limiter at our track, and that this change is thought to improve reliability.  The change will allow for more aggressive gearing which should increase the speed and the fun of WF.  The engine performance will decrease as it reaches the higher RPM's (max just beyond 8,000), so it will never hit this rev limiter.  The change in rules also allows for use of more reliable clutches.  All other IKF World Formula rules are followed.  Note that the Red Ignition (7,100 RPM) is still legal, but you may be at a disadvantage compared to those taking advantage of the blue ignition coil.

**** Kid Karts will run at 160lbs.  Reference the recent 9/12/17 IKF/HPD Rules Update

***** We expect Air Cooled 100cc 2-cycle classes to become popular in the future.  Some details (weights) are yet to be to be determined.

Please direct any questions to our Technical director at This email address is being protected from spambots. You need JavaScript enabled to view it.

  • Kid Kart
  • Briggs LO206
  • World Formula
  • 100cc TAG
  • TAG
  • Shifter
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Kid Kart Honda

The new Honda GX50 engine has taken the USA Kid Kart category by storm. The engine has a low entry price, and a predicted 100+ hours of reliable operation.  The engine is sealed direct from Honda, with no internal modifications allowed, providing a fair playing field so racers can focus on driving improvement instead of buying more horsepower.

 
LO206

Briggs LO206

The Briggs LO206 engine currently represents the greatest number of race entries at PKRA, in Junior 1, Junior 2, Senior, and Masters classes, and is very popular in national race series.  This entry level 4-cycle is popular for it's low cost of ownership.  The sealed block achieves parity without costly blueprinting.  The engine has proved to be very reliable, and even short block replacement at end of life is very affordable.  Tire life is also very good.  Yet at this low price point, the racing is always close, with lots of passing.  

 
WF C

World Formula

Briggs and Stratton World Formula 4-cycle is a step up from LO206.  We run a limited class using the Blue Coil which allows for more aggressive gearing and which also appears to have made this engine significantly more reliable.  With 30% more power than the LO206, it's a good choice for those who want a little more without breaking the bank.

 

100cc TaG

100cc TaG is the smaller Air Cooled cousin of the 125cc TAG.  These newer engines are designed for reliability and low maintenance.  Their more modest power makes them a good choice for the less experienced driver, but are a step up from the 4-cycle engines. Another factor in the affordability of this class is the use of the same tire compound as the 4-cycle class, which wears less than the softer tires in the 125cc TAG class. This class is new to PKRA, but it is gaining popularity elsewhere, and is expected to become  a sizable class here in the near future.

iame ka100 kit
 

TaG

TaG takes it's name from the "Touch and Go" electric starter, but the fun comes from the greater horsepower of these 125cc high revving 2-cycles, matched with the grip of the softer compuound tires.  The only thing faster are the shifters.  There are several popular engine brands being used in national series, with classes from age 8 on.  Racing has been sporadic as of late at PKRA, with many opting for less costly 4-cycles.  There appears to be interest in the  air cooled 100cc motors;  however, which reduce cost over these higher horsepower 125cc cousins.

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Shifter

PKRA has fostered some of the Nations Top Shifter Kart Pilots.  Shifter Karts are exciting, and action packed.  If you are familiar with motocross bikes, you will be right at home working with the Stock Honda CR125 engines utilized in this category today.  CR125 Engines provide an economical engine for this category.  While there are quite a few local owners of shifters, racing has been sporadic .

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