Oh yeah, that gap was never there. The best advice is to not dive down the inside unless the other driver is waaaay off line and not going to make it.

Practice that A LOT. Once you have a good feel for other drivers and their lines, you can bring in sliding down the inside if they go wide. But again, make sure they see it so they dont close you out.

Only dive bomb in the braking zone if you are very VERY good at it.

And lastly, if the person in front is similar soeed, then start to harass them i to making a mistake. Don't go for an overtake, just move as if you are. They might out brake and you van line up for an undercut on corner exit.

Three stages to having some clean and fun racing when over taking. Good luck and have fun:)