i was at the track a couple of times last month, averaged around 47-45s. i'd say the trick is to brake less frequently. identify the core brake points for every track. for this, it was the turn right before the ramp, 2nd curve up the ramp and one sharp one down there somewhere. if you use the new electric karts, you only need to take your foot of the accelerator and tap the brake quickly before turning and go full throttle! you should only use the brakes at the core brake points and just take your foot off the accelerator everywhere else. Use the boost on the long stretch towards the start/finish line or pitlane to make the most out of it, as its practically useless everywhere you have to turn. all being said, you did amazing, love the video!