Help! No acceleration

[High Desert]

Greetings!

My beautiful bike has no power.

Possible contributing info:
A few months ago, I removed the tank to retrieve a piece of plastic leather thT I dropped into it by accident.  (I have successfully removed and reinstalled the tank a couple of times before. )

I haven't ridden it since around that time due to a shoulder injury.  Was running fantastic before then. I added fuel to it a couple of days ago and it dripped a little around where the hoses connect to the stopcock assembly.  I tightened those and added more fuel today.  No leaks.

Turned on choke, cranked it up.  Let it warm while checking for a drip again.  No drips.  Warmed up nicely.  Drove it around the neighborhood and it seemed to get progressively more sluggish.  Thought I might have heard some  light clicking like valves?  Restarts fine. It no or slow power.  Have to rev slowly.  Thoughts or ideas to try?

[Skinhead]

Kinked fuel line or cracked vacuum line to petcock, or kinked vent line to tank.

[Chrisj CMA]

Did you forget to take the choke off?

[High Desert]

I did take off the choke but I don't I'll ensure it's working properly.  Great suggestions both.  I will look into them.  It's prime riding weather here so thx for the quick responses!

[ridingron]

General rule of thumb.

Look at the last thing worked on.