As noted by others, go through the carbs and check/set everything. I'd replace the throttle needles and needle jets and at least check that the mains are the same and correct size. You might be surprised to find any of the changeable items different in each carb! Also a new viton tipped float needle. If the oem floats are ok, I wouldn't bother replacing them but some folks like the new "stay up" floats.
My experience with ticklers/floats...
First, it's worth remembering that the level of fuel in the tank determines the "speed" of the tickling so a full gas tank might result in a tickle "overflow" in 2-3 seconds while a nearly empty tank might require considerably more time. That's just physics!
Second, as noted, the float level has a major impact on tickling. The higher the float level, the faster the tickling overflow will occur (but the above re the fuel level still applies). It is possible to have no tickling if the float level is too low because the buttons don't reach far enough.
Third, on my 850 Commando, I have found that the best float level for operation, (with original amal floats/viton-tipped needle), is with the front of the float (free end) .060 below the top edge of the bowl. .080 works well also but tends to put the ticklers at the limt of their reach. I realize there are other much higher recommendations but when I've tried those higher levels, flooding occurs quite easily due to engine vibration. My Commando works really well at the .060.
Fourth, it is possible for the tickling action to dump fuel into the combustion chamber BEFORE there is any visible sign of dripping on the outside of the carb and you can put enough fuel in a cyl whereby the engine will not kick through and you have to pull a spark plug, kick it over a bunch of times (and spray gasoline on the ceiling of the garage). Yes, I know this from experience. As a result of this possibility, I never engage a tickler longer than a count of 5 (seconds). So for me, tickling is until fuel drips externally OR the count of 5 is reached, whichever occurs first.
The above is my experience with MY commando; your mileage may vary!
