Justin's stepping up his motorcycle game! The singer bought a Harley-Davidson and took it for a spin for the first time, on Tuesday, as wife Hailey Baldwin watched on (probably praying to God he stays safe!).

Bieber put on his helmet and mounted the beast as he left a Beverly Hills office building with Hailey following behind in the couple's Lamborghini Urus SUV, along with a bodyguard on his bike. Justin's nothing if not careful!

In a rare moment when we saw Justin without his helmet on, we noticed something ... a new buzz cut! Justin sheared the sides and left the top a little longer with this new look -- perhaps more conducive to wearing a helmet on hot summer days. Love it!