1993 CBR 600

The bike sat all winter without fuel stabilizer. It would not start up when I first tried. I pumped out the old gas, put fresh gas in, still nothing. The plugs were wet, but "looked" good. (I changed them last year). I cleaned them up, let it dry out a bit, and still nothing.

So yesterday I tore it apart, cleaned out the carbs real well, put it back together, and still nothing. Then I checked to see if there actually was spark. Could only get spark out of one plug.

Today I bought 4 new plugs, got spark out of all of them. (coils and wires are all good). Before I put the tank back on, i poured some starting fluid in the carbs and tried starting it. IT WORKED. Fired up and died.

So I put the tank back on, thinking I had it fixed...but I can not get it to fire again.

Am I not getting gas? There is suction at the petcock from the skinny tube that goes to the first carb.

Any help/suggestions would be GREATLY appreciated.

 

so u do have strong spark now? if not check ur ignition coils. u using choke to start?

 

yea, spark looks good and yes I did use the choke.

Like I said, it fired up with the tank off and starting fluid in the carbs. After I put the tank on, i got nothing.

 

Is your petcock in the ON position? Is there fuel coming out of the bowl drains?

 

You probably have a clogged petcock (the old gas you cleaned out of the carbs). You can/should disassemble the petcock and clean it as well.

 

Thanks for the replies. I will try the petcock tomorrow. Is it pretty simple to take off/apart?

 

It fired when I used starting fluid, which means I have spark, correct?
There is gas in the carb bowls, and they were empty the other day because I cleaned them out, which means I am getting gas, correct?

 

probably, have you checked all of your vaccum lines, there should be one that comes off the far left cylander and goes to the petcock, if thats not hooked up it wont suck fuel

 

If the float bowls are full of fuel it should run for a minute or two before running out of gas in the bowls.

How did cleaning the petcock turn out?

 

I did not clean the petcock. The bowls were empty when I put the carbs back on. After putting everything back together and trying to start it, the bowls filled back up with fuel. So for some reason, the gas is not leaving the bowls? It's torn apart again and I am still stumped. The Pilot screw is open approximately 2.5 turns, and all the jets should be clean and clear of obstructions. I am completely stumped