A Motorcycle Carburetor will succumb to your weight if you are overweight, so if you wish to have it for a long time, you need to keep fit and maintain average weight so you can also fully enjoy your motorcycle. Another factor while keeping fit is to have regular practice sessions on your motorcycle especially if you normally also use other forms of transport to get around.
The best place to perform rider practice is to find a large parking lot and make a course with some type of markers for slow riding technique.
It's obvious that these carbs are all clogged up. Some carbs might not look so bad, some might be a lot worse. It's always a mystery what will be inside the bowls.
Now it's time to remove the floats. It's generally a good idea to drench everything in carb cleaner (available at any autoparts store).
Sometimes the pins will practically fall right out, sometimes they'll be so stubborn you won't think they'll ever come free.
But they will Carefully push on the pin from either side. Sometimes a nail and a gentle tap from a hammer is helpful.Be careful using force to remove a stuck float pin can break off the pin tower.
If they are really stuck and you can't seem to work them free here are a couple tips.
Heat - Adding a little flame to the float pin Carburetor float towers can help.