What is wrong if a bike spits and sputters? I have a 2000 cbr 600 f4 that has started spitting and sputtering and even going dead when i come to a stop and go to take off again. it doesnt have much po

SOURCE: Sputtering at low speeds and takeoff

your low speed jets are stopped up ,the carbs need cleaning, go to walmart a buy some SEAFOAM, poor it in your gas tank ,start it up on choke, and when it start ot clear up take it off of choke, or ride it until it clears up. after it starts running good get it synchronized

SOURCE: Bike is sputtering in high 2nd/3rd gear, best kind in idle

Sounds like a lean condition. Spark plug should be a tan brown.
I would say the carb probably wasn't drained prior to storage and your main jet is gummed up. Gas deteriorates very quickly especially in vented containers like the float bowl of a carb.
clean your carb for sure.

SOURCE: spits sputters and backfires

carborator needs to be cleaned and the float needs to be reset

SOURCE: Shuts off spits and sputters

Check for vacume leaks first. Rubber lines..gaskets to carbs ect. Also remove and blow out your fuel line to tank and change out filter. Hope this helps.:)

SOURCE: Harley spits and sputters.

Unless an aftermarket device has been installed on your bike, you must take it to a dealer to get the fuel map reworked.