Hey guys I got a CBR 600 F2 from my dad and I've been trying to figure out what's wrong with it cause it wont turn on or start. First he told me it was the battery, I bought a new battery and it turned on. Then he told me the carb must be dirty cause it wont start. So I took it out and cleaned it then put it back in now he's telling me that it's not getting any gas... Now before I took the fuel tank off I noticed these 2 nipples next to the petcock there was nothing attached to them. I've been reading on this forum that those are for air flow to push out the gas. He told me one is just a hose for air and the thicker one is attached to something. Now that being said where can I find the thicker hose? I don't see it.

 

Not sure what nipples you are talking about. There are 2 that are on the carbs, and they aren't connected to anything, but next to the petcock?
Pics help.
So I presume the bike turns over? Did you check spark? If you have spark, you should try manually adding fuel to the carbs via the inlet, to rule out a fuel pump/petcock problem.

 

These:

 

One is the vent for the inside of the tank. The other is to drain the area around the filler neck. Usually there are hoses to each that run out the bottom of the bike.

 

So that's not my problem then it has to be with the spark plugs then?

OK, that's one thing I don't have to worry about...can anyone give me a guide on removing the spark plugs? I can't fit my hand in there and I don't have the toolkit it comes with.

 

3 common things that stop these bikes from starting are the petcock, dirty carbs, or the regulator/rectifier. Start with the petcock.

 

There's been no mention of the vaccum hose from the petcock to the nipple on the cylinder head at cylinder 1; when the engine is cranked over, and vaccum is created, it employs this little hose, to open the diaphragm in the petcock... if this hose is missing, or cracked/damaged, the petcock will never actually be "turned on", so that gravity can do the rest.

To test this function at the petcock, connect a length of fuel line to the appropriate larger nipple on the petcock, so that it can drain into a container, connect the vaccum line to the petcock and engine, put the petcock in either On (down) or reserve (up), and crank the engine over - if the petcock is working, then fuel should start to flow to your container, and you can turn the petcok off (forward) to stop it.
Once the engine's turned off, or you quit cranking it over, the vaccum in the petcock will dissipate (takes a few moments), and fuel will not flow, even if the petcock is on or in reserve - essentially, this hose "activates" the petcock, so that the fuel bowls can stay full.

Tell us what you find, and, good luck!

 

The Petcock is broken (I field-stripped it and the part that holds the spring+ball shattered in to pieces). I Pulled out the spark plugs and they were black and finally I poured gas in to the carbs and it worked.

 

I bought a new petcock online but while I'm waiting is there anything I can do with the broken one?

 

Depends what parts are still usable inside, but you could reverse the spring so it's open all the time and plug the vacuum holes until your new one arrives.

If you do this, just remember to turn the fuel off at the tap when the bike is turned off.