Reno, unlike Ascot, was not cheating by using a Glider or Armor, or by using magic. He was driving in a kart that he went and made where Karts were made, easily able to get past any security or guards with his magic. Also, unlike Ascot, not that there was anything wrong with Ascot's more aggressive style of racing, Reno was more of a passive style racer. Taking timing into account for when other racers would try and bump him off to speed past them, using power ups accordingly to get past other players or protect himself from other racer's attacks. 

Needless to say, Reno's knowledge of racing games wasn't all talk. He was quite the good driver, and from the expression on his face he was having quite the grand time, passing both Ascot and King Candy after the evil ruler was knocked off the track, Reno completely forgetting why they were even here. Probably like Vanellope, he was too focused on having fun while racing. If he won, that was just a bonus, but he was here to enjoy the game and have fun, weaving through and past other racers with ease, soon enough catching up with the lead racer, who was probably Vanellope. Relying on Reno for this racing mission... was probably not going to be the best idea since he was too caught up in the race to remember the reason why they were even in this world. 

"I've played lots of racing games before, but being in a racing game is amazing, who knew coming to a video-game world would be so much fun!" He called this out to the lead racer before trying to speed past them, a big, happy, lucky-go grin on his face as he was enjoying the race and just having fun.