I just picked up a 94 cbr600f2. It starts up and idles fine but when I apply the throttle it seems to bog down and dies. If i turn the choke up or turn the idle up with the adjustment **** on the side I can apply throttle and it will rev right up. A friend of mine said it sounded like its getting to much air, could this be true?

 

How far up do you turn the idle to get the beast idleing again?

 

I wish I knew but I don't have any gauges right now but it seems like I have to turn it up pretty high almost like the choke is on. It idles at low rpm just fine it just dosnt want to respond when I twist the throttle

 

If the idle is turned up really high, I say, clean the carbs, rebalance them and adjust the pilot screws. Before doing that though, you can try dumping Seafoam in the tank and run it for while. Sometimes that will get some of the gunk out, but if the bike was sitting awhile, and the carbs weren't properly drained for long term storage, then a good cleaning would not be amiss.

EDIT:
OH, make sure the fuel petcock is open! Make sure the vacuum hose is connected from the petcock to the carbs as well.

 

If you have to twist the adjustment **** on the side to keep it running well, then you need to fix the carbs. The **** can easily make your bike idle at 2 and 3k rpms.

I'm dealing with a carb issue right now. Hoping a really good cleaning will solve the problem. Either way, at least you know that it has spark when running, so the other thing to look for is fuel/air.

 

I took them apart and cleaned them already. Now I'm just waiting for the tool to sync the carbs. I seated all the pilot screws and then turned them all out about 2 1/2 turns. Not sure if that was correct since this is my first experience working on carbs. Also going to be putting in new spark plugs. Is there a way to test if the diaphragm in the petcock is bad?

 

Yes, 2.5 turns is exactly where you want to start off before syncing. After balancing, you'll want to adjust the pilot screws. You'll need an accurate tach to do this correctly! The Actron CP7677 Multimeter has the accuracy required.


You would hook it up here:

Which would look like this (under seat, right side):


QUESTION: When you "cleaned" out the carbs, you made sure all of the paths within the carbs are clear, right? The "Cleaning carbs" threads I've seen really doesn't go into this and caused me to remove the carbs 2 additional times before I finally got it right.

Basically most, if not all, holes in the venturi should have an alternate exit, in the bowls and possibly the top of the carbs. Usually the other exit is a copper fitting. Keep in mind, some of these holes are the size of a hair and can be easily overlooked.

All copper fittings should also have an exit.

 

So after I balance the carbs, what is the process for adjusting the pilot screws? I have the Honda service manual but it doesn't explain the process very well.

 

Download the service manual here, hondatech.info: Honda service manuals and go to section 6-14 (pg 55)

 

I have that already it just doesn't explain the processe very well