Anyone operating a pit vehicle during a Texas Motorplex Event must be 16 years of age. Pit Speed Limit is 10mph. You must register your pit vehicle at any NHRA Division 4 race track. Pit Vehicle Registration is $10 per vehicle. This includes but is not limited to 4 wheelers, UTVs, golf carts. You can register your Pit Vehicle at Texas Motorplex’s Race Control Suite 208.