The Open 2-Stroke Championship presented by Word Racing.

Professional run. Grassroots focused.

Shifter Kart racing in the NorthwestThe Open 2-Stroke Championship was created to bring back the fun and participation in local kart racing. With a focus on making the fast 2-stroke classes affordable and open to nearly all types of 2-stroke engines, we are giving people a place to race competitively with either older “obsolete” engines, or the latest engines. Professionally run, but grass-roots focused, we welcome all levels of Karters from the weekend warrior simply looking to hangout with his friends and have a great time, to the semi-pro Karter looking for competition and track time to prepare for big events such as the SKUSA Super Nationals. This is a series that keeps costs to a minimum, and where camaraderie off the track and wheel-to-wheel competition on the track is the rule.


For questions, contact Randy Word by phone at 503-757-1776, or email info
*(@ o2schampionship .com)


Be sure to join us on Facebook at


2019 Schedule:
- Sunday May 19 -- Mac Track (McMinnville)
- Sunday June 30 -- Boise, Idaho Fairgrounds Motor Fest! ***Click here for PDF flyer with detailed information and race schedule***
- Saturday July 27 -- PARC Night Race!
- Saturday August 17 -- PARC Night Race 2!
- Sunday September 15 -- Mac Track Grand Final & Awards


"I had so much fun very enjoyable weekend you guys are awesome the prizes are great keep it up nice to see you doing it right"
 -- Brian Nixon 4/22/2018


The 2019 series is presented by WORD Racing. They are providing the funding for the medals, podium hats, website, banners, and much more (including many hours of organization, promotion and planning). Please visit their website at and support them. They carry the latest Snell standards helmets (from Arai, Zamp, and Pyrotect), 360 Plus Devices, Ribtect vests & seats, tires, oil, and much more. They are the NW Tony Kart dealer and also the Northwest distributor for the awesome made in USA iKart Indianapolis racing karts – double winner of the SKUSA Summer Nationals.


CKR USA is the Shifter Lights class sponsor. Visit their website at


Xccel Racing is the Shifter Heavy class sponsor. Visit their website at


Zamp Racing is the O2s100 class sponsor. Visit their website at

Click link below for PDF document explaining class weights, fuel, tires, etc.

The 2019 O2s Supplemental Technical Regulations manual - updated 5/30/2019


For the general OSKCS rules that we operate under, click the follwing link:

General OSKCS rules


Sign up to race: 2018 Driver Information Form (2019 form coming soon)


O2s Championship classes are as follows:

- Xccel Racing Shifter Heavy -- Honda Stock Moto S4, X125S, ROK, DD2, and ICC/KZ

- CKR USA Shifter Light -- Honda Stock Moto S2/S1, Stock TM Moto, ROK, Honda Mod Moto, X125S, DD2, and ICC/KZ

- Zamp O2s100 -- ROK VLR, KA100, X100AC, KT100 - Jr 310 (22mm), Sr 350, Mstr 380 (KT100 300/340/370)

- TaG Masters -- X30, X125T, Leopard, Rotax, Vortex ROK, Dragon, etc.

- TaG Sr. -- X30, X125T, Vortex ROK, Leopard, Rotax, etc.

- TaG Jr. -- X30, X125T, Vortex ROK, Leopard, Rotax, etc.

- TaG Cadet -- Mini/Micro Swift, Jr 1/2 restricted X125T, Vortex ROK, Rotax, 100cc Leopard, etc.

*See the Supplemental Technical Regulations manual for complete list of engines and weights

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