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PKC SoCal Classes

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The ProKart Challenge offers a broad spectrum of classes that provide a place to race for drivers of all skill levels and racing experience. The impetus of the series is to offer a friendly environment where anyone can race with virtually any kart package.

Notes:
  1. All classes must run the PKC spec fuel: Motul Kart Grand Prix oil + either VP MS98 or VP C12.
  2. All classes must run the PKC spec tire: MG-MZ marked with the SKUSA/PKC stamp for race sessions. Practice tires are open spec.

S1

Engine: ICC or built Moto
Age: 15+
Weight: 385lbs
Fuel/Oil: Motul Kart Grand Prix oil - Moto: VP C12, ICC: MS98

G1(Expert) / G2(Intermediate-Novice)

Engine: ICC or built Moto
Age: 32+ or driver weight greater than 200lbs
Weight: 405lbs
Fuel/Oil: Motul Kart Grand Prix oil - Moto: VP C12, ICC: MS98

S3-Light  (Expert)

Engine: Spec Honda
Age: 14+ (under 15, two years race experience and Race Director approval)
Weight: 385lbs
Fuel/Oil: Motul Kart Grand Prix oil - VP MS98

S3- Heavy (Expert)

Engine: Spec Honda
Age: 14+ (under 15, two years race experience and Race Director approval)
Weight: 415lbs
Fuel/Oil: Motul Kart Grand Prix oil - VP MS98

S4-Light (Intermediate-Novice)

Engine: Spec Honda
Age: 14+ (under 15, two years race experience and Race Director approval)
Weight: 385lbs
Fuel/Oil: Motul Kart Grand Prix oil - VP MS98

S4-Heavy (Intermediate-Novice)

Engine: Spec Honda
Age: 14+ (under 15, two years race experience and Race Director approval)
Weight: 415lbs
Fuel/Oil: Motul Kart Grand Prix oil - VP MS98

S5 Jr.

Engine: Restricted Spec Honda
Age: 12-15
Weight: 340lbs
Fuel/Oil: Motul Kart Grand Prix oil - VP MS98
Chassis:  Only these chassis will be allowed in S5 until further notice: Arrow, Birel, CRG, First Kart, GP, Intrepid, Italkart, Margay*, Kart Mini, Sodi Kart, Tony Kart, Top Kart, TrackMagic*, Wildkart

* other North American manufactured chassis are included

NOTE: Must order Restrictor from PKC. See Online Store or call 951-491-0808.

TaG Senior

Engine:  See below
Age: 14+
Weight: Engine dependent - See Below
Fuel: Motul Kart Grand Prix - VP MS98
 

TaG Master

Engine:  See below
Age: 30+ or driver weight greater than 200lbs
Weight: Engine dependent - See Below
Fuel/Oil: Motul Kart Grand Prix + VP MS98

TaG Class 'A' Engines (Senior 390lbs, Master 430lbs)
 NO 4-Strokes
  • Comer
  • Sonic VX125
  • Sonic TX125
  • Italsistem

TaG Class 'B' Engines (Senior 360lbs, Master  400lbs)
 NO 4-Strokes
  • PRD Fireball
  • Rotax
  • BM Jaguar
  • Leopard
  • EasyKart
  • Vortex ROK
  • ROK TT (+15lbs) See add'l rule below
  • Motori 7

NEW RULE 3/14/08 -- ROK TT:

While there has been considerable discussion and controversy concerning the TT engine recently, SKUSA has remained unconvinced that the approach some other organizations have chosen is the correct one for our members.  Basically one issue to keep in mind is that both organizations that have released significant rule changes run the engine at the same weight as Leopards.  SKUSA does not, and has chosen not to implement most of those changes at this time.  This will allow heavier drivers to chose engines which may have more horsepower. WKA and IKF both have two differences to their rules from the other two organizations:
  1. A 15 lb weight difference to Leopard engines
  2. Use of an WKA/IKF legal air cleaner adapter which is now referred to in "Stars" rules as "flat back adapter".  This adapter is described in the WKA Tech Manual section 551.2b or IKF Tech Manual section 603.1.3  Note that Tony Kart USA, Tony Kart Florida and J3 Performance have all been made aware of this and are complying.
The WKA released a statement today outlining their experience with the above rules and restating their intent to remain with the existing rules based on the performance comparison to date. 
 
Effective 3/15/08 we will implement the following changes:
  • ROK TT weight raised to 375# (Senior) or 415# (Masters)
  • Standard, non velocity stack style air cleaner adapter as described above.
SKUSA is approving the ROK TT for competition at ProKart Challenge events, with the following additional parameters (click here for homologation PDF):
  • Fitment of a .1mm head shim
  • Timing limited to 20 degrees BTDC
We reserve the right to make additional modifications to our rules as experience dictates.