I got this 98 cbr 600 f3 from a lady down the street from me. It haspractically no miles on it but for some reason it smells like it's running real rich,andwhenI give it gas it just dies from what seems like flooding. It had been sitting with old gas in it. It started backfiring like crazy when i tried to start it today. Can anybody help?

 

clean the pilot jets.

 

drain the old fuel from the tank and if you can, the carbs too. White the tank is off, take off the air filter and spray some carb cleaner into each carb. Dont be bashful, loead it up. Remember to hold open the throttle to get some down into the cylinders too. Let that sit for about 20-25 minutes while you put things back together. Fill the tank with fresh high octane gas and half a bottle of SeaFoam fuel treatment. Take the tank to the gas station is you dont have a gas can, SeaFoam is at Advance Auto or Autozone, red and white bottle. Get in running again and just let it idle for awhile, till its at least hot. Its gonna take some cranking because of the carb cleaner in the cylinders. Hold the throttle a pinch open, should help. Anyway, once its hot from idling, shut her down and go watch some **** for 30 -45 minutes. Come back and fire it up again, let idle for 10-15 minutes...then try revving it bit, slowly at first. If its starts revving, then good, things are getting clean. If not, dont worry about it yet. After 20 minutes of running, shut her down.

Come back the next day, and fire it up. Let run 15 minutes. try revving and so on. Let sit for an hour this time, then restart it for 15 minutes. Let sit for a few hours. Repeat.

This is what I had to do with my 95 that had been sitting around for a bit. It's basically the slow way of cleaning the jets and such, if you dont want to pull the carbs. Also, while your doing this, as the carbs get cleaner you' probably have to adjust the idle. Keep it around 1500 RPMS when warmed up.

 

Um...doesn't the carb cleaner eat the rubber?

 

no.

 

+1 nope.