So i just bought a 91 F2 TODAY, it seemed to be running good, took it out on the road for 20-30 minutes, then it started to die when stopped. So then i would start it up with the choke, and then after some more riding it would die. pull, the clutch in without revs, die. then it would hardly start with the choke, Id have to give it a fair amount of gas, let it sit, then it would die after a few minutes when i would stop or pull the clutch in and be at idle. Now it doesn't start at all, just cranks the same with or without choke. Now it starting to crank slower and slower. I do not have any tools yet. What should I do. Did i flood the carb or something? fuel lines gunked up? Lean? Rich? any advice much appreciated.

 

Hard to say for sure. But here are my guesses.

It's cranking slowly now because you've run down the battery starting it a bunch of time.
First thing to do is fix that, get a battery charger or tender and charge the battery up full.

Then start the bike and go for a ride. Until it dies. Open the gas cap and see if that fixes it.
People love to screw with the gas tank vent for some reason and if it's plugged, the bike will starve for fuel.
Opening the cap is a way to 'test' that.

Then get some tools and check the other common things on F2:
Make sure the petcock is working and hooked up correctly.
Check the air filter, if it's aftermarket, make sure it's not over oiled or dirty.

A warmed up F2 should NOT need to be choked.
If that is the only you can get it started when warm, then your carbs are probably plugged.
Also check for crud inside the gas tank.

 

Hey thanks for the response.

So I bought a battery charger and charged it up, cranked nice and good but still no action. But also an issue on my mind is the petcock **** has been changed or something and it does not accurately represent if the fuel is on or off. I was twisting it around earlier to see if putting it on reserve would change a thing but now I don't know what it's on.

But yea, batteries not the issue and it just won't start anymore for some reason.

ALSO.... I forgot to mention that the red oil light was on whenever it was running and having its initial issues, so I don't know if thats indicative of a specific issue.

Again, thanks for the help. I probably shouldn't have spent all my money on the damn thing but I loved it when it worked.

 

Maybe post a pic of the petcock?
On the stock petcock, 12 oclock (up) is Reserve, 9 oclock (left) is OFF, 6 oclock (down) is on.
Lift the tank, turn petcock on, put a little vacuum on the vacuum hose of the petcock, see if fuel comes out.

You also should figure out why the oil light is on. Maybe it's just a wire, find it and hook it up again.
If you've really got low oil pressure, don't run the engine, you could destroy it.
Was it making any strange noises?
You might want to run a compression test at this point.

 

again requesting information on cbr 600 f2, how many friction discs must have and how many metal. I keep restoring the f2, and when I disassemble the clutch I find that it only has friction discs, and therefore it did not work well. Thank you

 

So I just got back from my home city, and when I started it for the first time back it came alive but was popping like crazy, and then after a while just would sit at 4k and I couldn’t get it to go down to a normal idle, and now it won’t start at all. It will crank, then pop extremely loud once or twice and then do nothing. I assume at this point it’s flooded or something, running super rich or the carbs are messed up. I’m gonna try and lift the tank today.

 

You should start a new thread as this is a different question.
You will be much more likely to get an answer then.

 

I'm beginning to think you might have a stuck float needle and it's flooding the engine.
Probably a good idea to pull the carbs and clean them.
Also give you a chance to look everything over while you're in there.

 

okay, cool. When I’m taking off the tank do I need to do anything special? I have the nuts off but I’m scared to disconnect hoses. Do I have to do anything special for the vacuum hose?

 

Not really. Just make sure the petcock is turned 'off', then disconnect the 2 hoses.
It might spill a little gas from the hose, but not much.

Helps to have a mostly empty tank when removing it (lighter).
So draining it first is always an option.

Also need to pull the 2 vent hoses from the holder on the frame.
I usually just leave those attached to the tank.