I have a carb problem and found out my float needle was stuck and leaked gas over night into the crank oil. could it possibly have leaked into the gear oil side as well?

SOURCE: cr 500 carburator

This sounds to me like a carb float being stuck open. Turn off the gas and drain the offending carb. Next, turn the gas back on and sharply tap the float bowl with the plastic handle of a screwdriver as the fuel bowl refills. The goal here is to vibrate the float to free it up. If doing this process a couple of times does not free the float I would remove the carb and clean it with a spray carb cleaner. Clean the air filter then re-mount carb. Next Remove the water trap bowl at the bottom of the petcock, (gas valve). Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ). Install an inline fuel filter.

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SOURCE: need setting for carb. adjuster on bottom of carb

Turn the adjusting screw all the way in until it LIGHTLY seats. Now back it out one and one half turns. Do the same adjustment for the throttle screw on the right side of the carb. You are now back to the stock factory settings.

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SOURCE: Leaking gas badly from carb. 2003 750 shadow spirit

You are rite float stuck, you can clean the carb with carb cleaner,fresh fuen and cleaner in the gas may clear it up. if fuel stops running all over but still pops and backfire still a problem carbs need to be taken apart and cleaned.if u have experience u could do it.if not it might cost more to have it fixed after you try,lots of small pieces to deal with.

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SOURCE: Over flow tube is leaking gas on a new cmx250

If its the overflow, cleaning the sticky carb float could be simple fix.
Turn off fuel, drain the carb, with drain open spray carb cleaner into the bowl through the drain.(enough to rinse away varnish) then try it out, if all is good you are done. If it still runs gas out you will need to open the carb up to clean out the trash.

SOURCE: leaking gas from overflow hose

Double check the float needle seat. Often a piece of debris will lodge itself under the needle. Check your fuel tank/fuel valve for debris or damage to the strainer screen on the fuel valve.