I've had my mechanic friend go through the carbs on my VFR 700F2 and at least one float sticks from time to time, causing over flow when the ignition is turned on and fuel pump starts. Is there a usual culprit that causes this or do I just need to pull them off again and check each of the floats? Also, whether or not its choked on start up doesn't make much difference. I don't try to choke it and it takes about 5 minutes of running before she runs and idles correctly. And over the last month or so, when it starts its not hitting on all cylinders for several seconds, then will start kicking in, maybe 2, then 3, then all 4 cylinders. Are these problems related? Ideas?
Sounds like you probably need to clean the carbs again to start with. One little piece of dirt or silt on the needle can easily gum up a float. After that, you need to check for spark by grounding each plug to the frame one by one and see where your fire situation is at. Also, try turning the idle up after starting to assist the warm-up process and see if that makes any changes.
Best to hook carbs up to a fuel source (no real need for the pump for testing) b4 mounting them up to test for leaks or overflow. lOOK FOR FUEL BUBBLING UP past a slide needle or dripping float bowls or maybe the fuel crossover tubes. Isolate the leak to one carb and focus your attention there. Inspect the tip of the float needle for any indention ring, and replace it if you see one. Magnification helps alot, AND I'VE ALWAYS USED A 10x lens for this purpose. Floats on modern carbs like yours DO NOT STICK !! I've never seen it unless some dope bent the pivot pin. Instead, you have a leaky needle/seat. Use a Q-tip wet and coated with kitchen cleanser pushed into the seat and rotated, followed by a washout with water, then fuel. May need to do it twice.
