I've had my 1981 R100RS in storage for awhile. I've been starting it periodically to keep the juices flowing, but I allowed the gas tank to run out of gas while it was running. I made the mistake of allowing it to stay dry until the next startup, which was a couple of days ago. Now it won't start. It's getting spark to both plugs, and gas will go through the gas tubing down to the Bing carburetors; but, when I took off the bowls, they were empty of gas. The floats move freely. Seems like, if the floats were in the downward position, the bowls would fill, unless the fuel inlet to the carburetors were clogged. What's the odds of both sides being clogged? I sprayed down both inlets with carb cleaner, and I'm letting them sit. Do these carbs need to be primed after running dry? Does anyone else have any ideas. I'm stumped. I'm not a mechanic, so please keep it simple. Yes the petcocks were in the on position. I want to get my bike ready for Spring. Below is a picture of the type of carb I have. I hope the picture works. Thanks for any help, Jim