Rahals too busy for kids

They're race car ROYALTY — Indy driver Graham Rahal and Funny Car star Courtney Force — but when it comes to having kids … the newly married couple says they're pumping the brakes … HARD.

Graham and Courtney both come from legendary racing stock — Courtney's family even had their own reality show on A&E ("Driving Force"). So, after they tied the knot last year, people started the same damn question every newly married couple gets … WHEN ARE YA GONNA HAVE KIDS!?

The answer? Let's put it this way … Graham's little guys ain't gettin' the green light while they're still chasing 4-wheeled glory. TMZ