TrailMaster Trail master 300XRX-E EFI Go Kart, Fully Automatic With Reverse Engine, Liquid Cool Efi (Fuel Injection) Trail master 300XRX-E EFI Go Kart, Fully Automatic With Reverse Engine, Liquid Cool Efi (Fuel Injection)We have upgraded our 300XRX go kart to fuel injection, the new model is now 300XRX-E. The 300XRX-E will look exactly the same as the 300XRX exception... $4,799.00 Choose Options Add to Wish list Compare