Blac Chyna Is Photo'd Out Driving a MOTORCYCLE . . . It Needed An EXTRA WHEEL IN THE BACK . . . To Carry ALL Of Chyna's EXTRA BACK!!!

Now that Chyna's no longer pregnant, she can do a lot of the things that pregnancy FORCED her to give up, like motorcycling.

Chyna was spotted driving her THREE WHEEL motorbike in The Valley in Los Angeles.

She also had her son King Cairo with her and let him take the wheel of the bike (while it wasn't moving).