Well, as a BMW Motorrad Master Technician and a motorcycle mechanic for nearly 20 years, I have no idea what you're talking about. The reason your question makes no sense is because I think you have your terminology all confused. You cannot start a bike and then spray anything into "the cylinder." The only way to get to a cylinder is to remove the spark plug (and look into the hole- your cylinder and piston are in there) or remove either your carburetors or your exhaust system. Looking into the holes left in the engine when these things are removed, you will see the valves, and behind THOSE is your cylinder. So starting the bike means you CAN'T spray anything into the cylinder because that would mean you had a missing spark plug, carb, or exhaust.
If by "cylinder" you mean the venturi to your carburetor (on the intake side) then this makes a little better sense, but spraying carburetor cleaner into your intake will wreck your carburetors, so stop doing that! Carb cleaner is meant to be sprayed on a carburetor that has been taken apart. Most carb cleaners melt plastic and rubber, and there is plenty of plastic and rubber inside of your carburetors, so spraying it into your intake will just make your problems multiply.
Your question also was very vague, so I have to ask: has this bike been sitting without being started for a long time, or was the bike running fine one day, and the next day or two started acting up? This one detail means two entirely different possibilities for you. If you had the bike parked for a while, then your problem is easy: bad gas inside the carbs, and they should be removed, disassembled and cleaned.
If it just started running badly all of a sudden, then you may have a major air leak (which could be before or after the carbs), you could have "dropped a jet", gotten trash in the carb, have a clogged fuel valve, any number of things. An air leak alone could be caused by more than 5 different things. If you're not a mechanic, there's no way anyone could tell you how to fix the problem since you wouldn't understand half of what they said to you. First off, you have to be able to tell us exactly what the problem is, and you kinda... can't. If I were you, I'd stop jacking around with it or you'll ruin it. Just take it to the shop- I swear it will cost you less to have them look at it than bunging up your bike yourself.
Your only real challenge is finding a good tech, because turnover in the industry is huge. Shop owners hire morons with little to no experience, and they are all the time saying stuff like, "you need new carburetors" instead of knowing how to diagnose them. If you really DO need a new carburetor, it would be a miracle, so if you get told that, get a second opinion.