Have not had a cannabis high in decades but when I was in High School I had a job installing car stereos. A co-worker of mine came to work high all the time and I swear it had no impact on the quality or speed of his work. If you feel comfortable and confident, maybe it's ok.
I tried it a couple of times and felt like an idiot. Spacing out and forgetting what I was doing and being paranoid about customers and co-workers knowing I was high. I think you need to be very aware out on a bike so I would not be inclined to ride in that condition.
If you do, I'd suggest trying it out on a bike path or trail first before mixing it up with auto traffic.