I HAVE A 1999 HONDA CBR600F4. IT HAD BEEN SITTING FOR 2 YEARS AND HAD BAD GAS IN IT. I REPLACED THE BATTERY, REPLACED THE PLUGS, CLEANED OUT THE CARBS WITH CARB CLEANER. GOT IT TO RUN AFTER ALOT OF STARTS. NOW WHEN I CRANK THE BIKE IT FEELS LIKE I HAVE TO LEAVE THE CHOKE ON TO GET IT TO IDLE. IT ALSO BOGS DOWN WHEN I TRY TO GIVE IT THROTTLE. i CAN RIDE IT, BUT I HAVE TO KEEP THE RPM UP. WHAT COULD THE PROBLEM BE? THE STARTER REALLY TURNED OVER A LOT TRYING TO GET IT CRANKED.....NOW WHEN I HIT THE STARTER IT WILL TURN OVER 3 TIMES THEN LOCKS.....SOUNDS LIKE A METAL SHRIEK SOUND. THANK YOU

I recommend changing the fuel filter, air filter, and adding Seafoam Fuel System Cleaner into the gas tank to clean the injectors as well as replacing the wires.

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replace filters,get good gas

This post may be an old post, but I figured I'd post my findings in case anyone is still fighting the good fight.
My vehicle:
2008 Honda Accord 2.4L EX-L
Codes: P062f p060a p2610 p2118
Hard starting when cold or sitting for over 25 min. Otherwise would start fine and drive fine with no issues until next start.
Process:
Replaced battery, no change
Sent Pcm (ecu) for repair/service. ECU came back with no errors or damage found. No change.
Replaced throttle body, no change.
Cleaned map and maf sensors, no change. (This fixed issue for someone so figured I would inspect.)
Replaced FTP, code went away, but no change.
*Note: During idle, I noticed a minimal sputter. Almost not audible.
Researched more, and one person mentioned they changed the spark plugs and that fixed their car.
So, I produce a list of all possible fuel/Ignition related possibilities for hard start/idle sputter.
Spark plugs
Ignition coils
Injectors
Fuel pump
As for me, I replaced the fuel injectors, ignition coils, and fuel pump about 2 years ago. And due to covid my car was almost not driven for the last 2 years. So, I removed them as possibilities for me. That left spark plugs.
I bought some NGK iridium plugs and replaced them. Old plugs were worn. (See pictures). This resolved my issues. No more cell lights, hard start, or idle sputter.
Definitely do your due diligence, but I'd say definitely go in this direction if your symptoms sound like mine did.
Good luck, everyone.

Sounds like the carbs are gummed up from the old gas sitting in them. Remove the carbs, disassemble, clean with a carb cleaner, and reassemble.

Clean the air filter if you have not done it yet. Get a spray can of starting fluid and spray into the filter. You did check the plugs for spark didn't you? If no spark, check the sidestand kill switch as well as the handlebar kill switch.

spark plugs??

push start o.k.? Has it been sitting for awhile?
bad gas maybe ...try fresh gas then some Seafoam fuel system cleaner... if you can get it running. also it might have a weak battery...trickle charge it four five hours then try again......battery votage after trickle charge should be minimun 13v.

1-check for strong battery
2-check for spark from the spark plugs wire
3-check for gas prusser
4-check if there is any after market alarm system build in your car