At Over-Under Racing, we're passionate about go-kart racing, and even more passionate about the racers who fuel the sport at the grassroots level. Founded by racers, for racers, our mission is to support the local karting community with quality parts and personalized service.
We offer fair, competitive pricing on all our parts, so you can focus on performance, not your wallet. Whether you’re gearing up for a club race, a regional race, or a national event you’ll find everything you need in our modern online shop, open 24/7 and stocked with trusted brands and essential components.
Do you race locally and need your parts fast? We've got you covered. In addition to nationwide shipping, we offer a convenient trackside pickup option at most North Texas Karter’s club races and some regional races as well, just order online and choose pickup at one of the local races we're attending. We also stock a selection of common parts at the track, so if something breaks on race day, there’s a good chance we’ve got you covered. It’s our way of keeping you on track and ready to race, with zero downtime.
From first-time karters to seasoned pros, we’re more than just a parts supplier, we’re your racing partner, dedicated to helping you chase the checkered flag.
Over-Under Racing Owners, Anna and Evan Kozak (Now & Back Then):
Local Tracks:
We are extremely lucky in the Dallas, Fort-Worth, TX area to have three amazing sprint kart tracks. All three tracks offer different membership packages and feature club racing days open to members and non-members.
North Texas Karters (Denton, TX): https://www.ntkarters.com/
Kartmoto (Cresson, TX): https://kartmoto.com/
Dallas Karting Complex (North Caddo Mills, TX): https://dallaskartingcomplex.com/
Local Classes:
Ages, engine packages and rules can vary between series, but below is a general overview of the clubs and regional series in Texas to help you better decide the best kart and engine package for you or your child.
Kid Kart - Ages 5-7
-Honda GXH50 (4 Stroke)
-Briggs & Stratton LO206 (4 Stroke)
TaG Cadet 1/Micro Swift - Ages 7-10
-IAME Swift (2 Stroke)
TaG Cadet 2/Mini - Ages 9-13
-IAME Swift (2 Stroke)
206 Cadet/206 Junior 1 - Ages 7-13
-Briggs & Stratton LO206 (4 Stroke)
100cc Junior - Ages 11-15
-IAME KA100 (2 Stroke)
-Vortex ROK VLR (2 Stroke)
TaG Junior - Ages 12-15
-IAME X30 (2 Stroke)
-Vortex ROK GP (2 Stroke)
-Rotax Jr. Max (2 Stroke)
206 Junior/206 Junior 2 - Ages 12-15
-Briggs & Stratton LO206 (4 Stroke)
100cc Senior - Ages 14+
-IAME KA100 (2 Stroke)
-Vortex ROK VLR (2 Stroke)
TaG Senior - Ages 16+
-IAME X30 (2 Stroke)
-Vortex ROK GP (2 Stroke)
-Rotax Senior Max (2 Stroke)
206 Senior - Ages 15+
-Briggs & Stratton LO206 (4 Stroke)
100cc Master - Ages 30+
-IAME KA100 (2 Stroke)
-Vortex ROK VLR (2 Stroke)
206 Heavy - Ages 15+ (and combined weight 390lbs+)
-Briggs & Stratton LO206 (4 Stroke)
Shifter - Ages 15+
-ROK Shifter (2 Stroke)
-IAME 175 (2 Stroke)
-KZ (2 Stroke)
Racing Series:
There are different levels of racing in sprint kart racing. Entry level racing is called "Club Racing" which typically involves a racing series at a single track throughout the years. The next level up is called "Regional Racing" which involves racing at multiple different tracks in the same state or multiple states in a region with a higher level of competition. The top level of racing is called "National Racing" and as the name implies, these series race at multiple tracks in multiple states throughout the USA.
Local Club Racing:
North Texas Karters (NTK) Club Racing: https://www.ntkarters.com/
-North Texas Karters typically hosts a 3 season racing series (Spring, Summer & Fall) on Saturdays where racers can gain points for a season championhip and an overall championship at the end of the years. NTK features 6 races per season (18 total) as well as some one-off races that do not count toward the championship, but may feature a monitary prize.
Dallas Karting Complex (DKC) Club Racing: https://dallaskartingcomplex.com/
-Dallas Karting Complex typically hosts approximately 10 races per year. The races are much more informal with no points awarded toward any championship series.
Texas Regional Racing:
DFW Triple Crown: https://dfwtriplecrown.com/
-The DFW Triple Crown is a three race series at the three tracks in the Dallas, Fort-Worth (North Texas Karters, Kartmoto, and Dallas Karting Complex). This series includes practice on Friday and racing on Saturday with a unique structure modeled after Formula 1. Saturday racing includes Qualifying, a "Sprint Race" and a "Grand Prix". This series prides itself on being an affordable way for racers to move up from Club Racing to Regional Racing.
Texas Karting League (TKL): https://tklrace.com/
-The Texas Karting League is a three race series at three tracks in Texas (Speedsportz, Gulf Coast Karters & Kartmoto). This series is focused on Rotax and Briggs & Stratton LO206 racers and does not have any 100cc or Shifter classes.
Texas Sprint Racing Series (TSRS): https://www.texassprintseries.com/
-The Texas Sprint Racing Series is a five race series at five different tracks in Texas and Louisiana (Speedsportz, Amarillo Karting Complex, Kartmoto, NOLA Motorsports Park & Dallas Karting Complex). This series is the highest level of regional racing available in Texas.\
National Racing:
STARS Championship Series: https://www.starschampionshipseries.com/karting
-The STARS series is positioned as the stepping stone between Regional and National racing. This series feature four races at four different tracks (Charlotte Motorspeedway, New Castle Motorsports Park, Quaker City Motorsports Park & Trackhouse Motorplex). STARS has a higher level of competition than regional racing, but still sticking to a three day race weekend instead of five days like most national series.
Cup Karts of North America (CKNA): https://www.cupkarts.com/
-CKNA is a national (and regional) series that is focused on the Briggs & Stratton LO206 engine package. There are race events accross the USA throughout the year and they attract very high entry numbers in excess of 300 racers per event.
United States Pro Kart Series (USKPS): https://www.uspks.com/
-The USKPS series is a top level national series featuring 4 races at 4 different tracks (Daytona Speedway, Trackhouse Motorplex, Briggs & Stratton Motorplex & New Castle Motorsports Park). This series features 5 day race weeks begining on Wednesday and attracts top level drivers from around the world.
SuperKarts! USA (SKUSA): https://www.superkartsusa.com/
-The SKUSA Pro Tour features 6 rounds over 3 race weekends at three different tracks (Speedsportz, Motorsports Country Club & New Castle Motorsports Park). These races attract top level racers from around the world and feature one round of racing on Saturday and a second round on Sunday.