FZRSupport: the FZROnline Archive

I posted a week ago about my idle. Well I'm waiting on a fuel filter, one now looks real dirty. So I'm thinking this could be a cause for my idle to slowly fall below 1000rpm to it cuts off.

Well I have not gotten the fuel filter yet from bikebandit. They are so slow . Anywho, Today with the airfiter box off I ran the bike, and I decided to check the air pull on the carbs with my hand. Interesting is that with them covered, not completely hands about 2inches above them the idle goes back to 1000rpm or so. (This does not happen with the stock air filter and box in place, just cuts off) So What does this mean? Wrong size jets? the emulation tubes need replaing? just dirty?
Any ideas

im so confused right now

How's the air filter? Might want to open the air box up as well to make sure you don't have anything out of place.

I'm thinking dirty air filter.

It have very little to do with your emulsion tubes, but if you haven't replaced them - I would.

Just might need to make sure that all cylinders are firing and that their individual temps are relatively close at idle. You can easily check that with an IR temp gun pointed at the same location on each header.

cad600 wrote:How's the air filter? Might want to open the air box up as well to make sure you don't have anything out of place.

when was the last time time the air filter was cleaned or changed

Sorry to make the thread so confusing. My bike would not idle correctly. It will start up and run with choke on. Then with choke is turned off the bike idle will lower until the engine just stops. I thought it was possibly the fuel filter. It looked a little brown and dirty. ( ordered fuel filter from bikebandit, but have yet to get it). SO while waiting I thought that I would try something else.

I removed the air box with fair filter, I wanted to spray a little carb cleaner in the intake part of the carbs. I restarted the bike and the idle did the same thing, slowly went down until the engine stopped. On a second time starting, I placed my hands over the intake/air side of the carbs and the idle went to normal, 1000 rpm. My hands were not making complete contact with the carbs, just hovering above them. My hands were just limiting the amount of air that was being pulled in by the carbs.

So the question is, with me limiting the air intake of the carbs, does this mean that the fuel coming in to the carbs is also limited, ie a blocked fuel filter or some other facter that is messing with the air fuel mixture.

I would think that your carbs need a good cleaning. Might want to try adding some Sea Foam to the fuel and see if it helps any.

sea foam wont be enough
pull out your carbs and give them a good cleaning. make sure your jets arnt clogged

That is what I had next planned. What would you guys recommend. I have used spray can carb cleaner, and opened each carb up and sprayed cleaner over all the parts, then put each carb back together. I do not take them apart form each other, I not sure how to resink them.

What about a dip? there is a carb wiki but it does not go in to great detail. I'm looking for what not to do.

Any advise or tips?
Thanks for everyones imput. I will take any info, and take photos alone the way for anyone else would needs help with this.

ALMOST wrote:
. My hands were not making complete contact with the carbs, just hovering above them. My hands were just limiting the amount of air that was being pulled in by the carbs.

So the question is, with me limiting the air intake of the carbs, does this mean that the fuel coming in to the carbs is also limited, ie a blocked fuel filter or some other facter that is messing with the air fuel mixture.

A,
By putting your hand close to the intake you are "choking" the air intake and thus making the mixture richer and so the bike runs as if it was on the choke mechanism.

Before doing anything else be patient and wait for the fuel filter frustrating yes but the way to go forward with real results.

One the filter is in we can eliminate fuel flow as areason for the engine dieing, fiddle then with the idle level knob, clean or replace the air filter the everlasting K & N version of the original filter is a great buy.

If you still have problems after that shout OK

ALMOST wrote:Sorry to make the thread so confusing. My bike would not idle correctly. It will start up and run with choke on. Then with choke is turned off the bike idle will lower until the engine just stops. I thought it was possibly the fuel filter. It looked a little brown and dirty. ( ordered fuel filter from bikebandit, but have yet to get it). SO while waiting I thought that I would try something else.

I removed the air box with fair filter, I wanted to spray a little carb cleaner in the intake part of the carbs. I restarted the bike and the idle did the same thing, slowly went down until the engine stopped. On a second time starting, I placed my hands over the intake/air side of the carbs and the idle went to normal, 1000 rpm. My hands were not making complete contact with the carbs, just hovering above them. My hands were just limiting the amount of air that was being pulled in by the carbs.

So the question is, with me limiting the air intake of the carbs, does this mean that the fuel coming in to the carbs is also limited, ie a blocked fuel filter or some other facter that is messing with the air fuel mixture.

By 'hovering' your hands you are improving the vacuum signal and probably pulling fuel thru the emulsion tubes in addition to (what it should be running at idle on) the pilot fuel circuit.

Have the tamper caps been removed from the pilot fuel screws? (below the float bowl in a cylindrical 'tower' coming off the main body of the carb, do your see a bright silver aluminum plug {one per carb} ? Or can you see a brass screw with a slot head recessed into the tower?)

If you see brass screws, use a small screwdriver and open each one up a half turn and see if that changes things. Try that and report back to us.

Spraying carb cleaner from the outside won't help you any (could dick up rubber stuff that shouldn't be exposed to carb cleaner in fact).

Thanks Yamahageorge, always the the word of wisdom. I hope to get the fuel filter today or tomorrow.

Reelrazor, thanks for the imput. I will check the fuel mixture screws/slug location. And yes, you are right about the carb cleaner and rubber.

OK, I put in the fuel filter. Same results. The air filter is almost new. Any other ideas that I should check before taking the carbs apart.

Would a week battery be a cause?
Would a fouled plug be a problem?
Thanks in advance.

Your carbs need to be cleaned.