Classes – Skcwa

Superkart Classes

Want to know more about our available classes? Read below for more information on classes offered.

Introduction

The primary goal of the club is to encourage and accept karters with their wide range of karts to race under a safe, fun and low-cost culture. To achieve this, the club has created TWO distinct categories of classes.

Sprint Kart Based Karts

Key point for these sprint kart based classes is that they must look like sprint karts. This necessarily means but not limited to the plastic bodywork inc. nose cone, nassau, side pods and rear bumper must remain in place. This category is for karts that have been used on sprint tracks, with the only real change being to adjust the gearing to suit the higher speeds. Despite the SKCWA name being superkarts, this category refers to generic and similar guidelines and rules pertaining to any matter, specifically including SAFETY, from other appropriate sprint karting associations or organizations (see listing below).

125 TAG

This is the lowest performance class, utilizing the wide range of 125 cc TAG style engines. These engines can have a simple centrifugal clutch, no gearbox (ie fixed ratio) and electric start. This makes the karts very simple to use. These karts are readily available second hand with prices from $2500 upwards. Essentially the only change to a kart from sprint kart racing is a change of gearing for which this might be 16/68 for a Rotax Max. It also includes previously homologated 100cc reed, rotary or piston port engines such as the Yamaha KT100S and ARC Spec 100s. Overall, the karts, engine and associated hardware is to be “as run” under appropriate sprint kart rules. Exceptions to this is a range of non-tech items to reduce the running costs.

KZ2 125 Gearbox

KZ2 powered karts offer the next level of performance. KZ2 class run under WA State KZ2 Rules* with engine specs for CC’s, Ports, Carburettor and Internal Gear Ratios as per sprint kart regulations (2000-2024). Typical gearing for a TM KZ might be 18/20 for Carco and 17/20 for Collie.

Open Performance

The fastest of the sprint kart based division (Max 250cc) these karts can use twin 125cc kart engines (mostly X30 and Rotax Max), twin 100cc reed engines or a 175cc can also be used. These karts are usually based on a shifter sprint or twin-engine kart chassis.

Classic Superkarts

The main difference between a superkart and sprint based kart is that superkarts can have partial or full aerodynamic body kits, laydown seats, more powerful engines and, as a result, they can be a lot faster. For this category, the SKCWA refers to generic and similar guidelines and rules pertaining to any matter, specifically including SAFETY, from other appropriate superkarting associations or organizations (see listing below)

Open 125cc Gearbox

This class allows for any 125 gearbox engine. Chassis can be either shifter class sprint kart or purpose built superkart chassis, eg Anderson, Stockman. CIK level apparel strongly recommended.

250cc National

The power unit is a single cylinder two-stroke motocross or a specifically designed 250cc kart engine. Chassis can be either shifter class sprint kart (suitably modified) or a purpose built superkart chassis, eg Anderson, Stockman. CIK level apparel strongly recommended.

250cc International

These karts use 2-cylinder 2 stroke engines with around 100 hp. Chassis can be either shifter class sprint kart (suitably modified) or a purpose built superkart chassis, eg Anderson, Stockman. CIK level apparel strongly recommended.

KEY FEATURES	CATEGORY A			CATEGORY B
	125cc TAG	125cc KZ	Open Performance	125cc Open Gearbox	250cc National	250cc International
Bodywork	As per sprint plastics. Drop down nose cone optional	Same	Same	Frontal or full aero permitted	Same	Same
Seat	Layback must be less than 45 deg from vertical	Same	Same	Lay down seat with headrest optional. 60+ mm set washers.	Same	Same
Rear Bumper	Sprint plastic or steel	Same	Same	Sprint plastic or steel	Same	Same
Side Pod bars	As per sprint	Same	Same	Min 2 horizontal side pod bars 100mm apart	Same	Same
Airbox	As per sprinthomologation	Same	Same	NA	Same	Same
Exhaust & Silencer	As per sprint homologation	Same	Must be compliant with noise regulations	Same	Same	Same
Brakes	Rear brake only	4 wheel brakes required	Same	Same	Same	Same
Tyres	Any Current or previous approved sprint Tyres .5" only.	4 wheel brakes required	Same	Any current or previous approved tyres. 5" or 6".	Same	Same
Rims	3 bead locks per rim	Same	Same	Same, but 6 bead locks recommended	Same	Same
Rain Light	Must be fitted and operational if and when track declared wet by SKCWA officials if running with Category B karts	Same	Same	Must be fitted and operational if and when track is declared wet by SKCWA officials	Same	Same
Battery isolation	NA	Same	Same	Switch for ignition & fuel pump must be easily accessible	Same	Same
Fuel	98 RON unleaded pump fuel only	Same	Same	102 RON race fuel permitted	Same	Same
Fuel Tanks	Central mounted only.	Same	Same	Same, but side tanks permissible until end 2025	Same	Same
Sensors	2 allowed per engine	Same	Same	NA	Same	Same
Exhaust Tethers	Compulsory	Same	Same	Same	Same	Same

Notes

1. The SKCWA refers to generic and similar guidelines and rules pertaining to any matter, specifically including safety, from other appropriate sprint or superkarting associations or organizations.

2. In addition to the above and the key features; rules listed below, all karts and apparel must be presented and maintained in this state of conformance, for the duration of any SKCWA event. Some of these are included in the self scrutineering checklist in which the competitor formally signs off prior to entering the track. This conformance is the total responsibility of the competitor. Karts and apparel may also be independently scrutineered during an event.

3. For Club and State Championship Events the SKCWA may specify the tyres to be used for that Competition AND may set weights for relevant Classes.

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