Hello, I am a new owner of a 1988 CBR 600 that I got in mint condition. She would start fine with the choke on cold for the first few days; then I cleaned the carbs, just the float bowl area (Jets) and put it back together. Now when cold it doesn't fire without a blip of the throttle. Sounds very good when warm and runs great, also fires right up when warm.

What could this be? I am going to change the spark plugs and air filter but I don't understand why she would start before and not now. Any help is greatly appeciated.
-Thanks

 

Update:

Just took off the carbs again and double cleaned the pilot jet, put it all back together and she fired in the first 3 seconds. All I can think of is that something wasn't quite right, either choke cable or the air box seal.

Hopefully she will continue to start so easily, we will see tomorrow. Thanks.

 

My guess would be that your idle was set too low

 

K, will check that, my next project is to sync the carbs. Just need to order a manometer.