Many thanks Alan Roubik for sharing his selfie with Keanu on his website and to @keanulatino for tweeting the link.
Mr. Roubik posted the following with the photo which is tagged May 1, 2016:
Hanging out with fellow biker Keanu Reeves
FYI Keanu is an avid biker, he started Arch Motorcycles, where they’ll build an awesome cruiser/sport bike to order.
Scroll down to the ‘Friends & Celebrities’ section. Click on the photo to open it in the gallery and then click on ‘View full size’ in the upper right corner to see the big version.