Replace settings.xml file in youngdriverstest folder. This mod is for passing the test easily for new drivers, restarting the game and those with mods that affect the top speed etc and want to start their new careers fast.
You will be able to pass day 1 easily to start your new career. The ai cars will be behind in kers & drs tests in day 2. If you still cannot pass them......may be you have no-drs mod ?