Can't get idle right. (Turning Adjustment Knob)

[Gold]

1999 Katana 600

It almost feels like the throttle gets stuck when I give it throttle, it revs up real high and stays there. Is that normal? (RPM won't come back down unless I turn the adjustment knob.)

And if I lower it down (the knob), it seems to idle ok for a minute, then just dies on me When I think I have it right, I take it for a ride and when I come to a stop at an intersection it just won't idle, it dies, then I have to pull off to the side and struggle to start it again. I tried to get it just right for about 5 hours today and it just won't seem to work.

Now the bike won't even start unless I give it throttle.

Its been doing some really wacky things on me today, and it seems like its going to be a tough fix.

Any ideas?

[arsenic]

Pilot circuit needs to be cleaned.

[Gold]

I filled it with premium yesterday, would that have any effect on it?

The reason I used premium was because it said: "Contains no ethanol"

All the other octanes said: "May contain up to 10% ethanol"

What should I do?

[Cheriff]

Pilot circuit needs to be cleaned.

With the throttle open and/or idle set really high you are able to get enough gas in there that the dirty pilot circuit isnt noticed.

[Gold]

Ok, that sounds like a big job, I have to take apart the whole carbs for that right?

Does it sound like I might need to sync the carbs?

[arsenic]

yeah, if you are interested in a set already rebuilt. Please PM me. Couldn't hurt, but that is not the cause of your issues.

[MikeyZ]

Not to hijack the thread but...
As my bike warms up, and the longer I ride it, the idle creeps higher and higher. It will idle when cold obviously around 1100. Then as it warms up it will be around 1500. Then if I go for a long ride it wont idle below around 1800-2000 even with the idle screw all the way screwed out. The carbs are not synced if that matters.

Any ideas?

[arsenic]

Yeah that matters. Sync the carbs.

[Gold]

Now, my bike only has 12,000kms (7200 miles) on it. Could the carbs really be that bad?

[arsenic]

YES! mileage doesn't matter even a little bit. You have a 99 with ~7,500 miles. That means it's done a whole lot of sitting. That is what matters.

[Gold]

YES! mileage doesn't matter even a little bit. You have a 99 with ~7,500 miles. That means it's done a whole lot of sitting. That is what matters.

As the day goes on and I keep trying it, its getting worse I was gonna take the wife out for a ride tonight too, she's gonna be choked that we have to spend more money on this thing...

Its impossible to start by itself now, I have to give it throttle to even start it. It doesn't want to idle either, and the rpms keep slowing down and sticking around 2000rpm whenever I rev it...

I just wish there was an easy way to fix this

Does it sound like it has anything remotely to do with spark plugs? lol because that I can do.

[Black_peter]

You need to clean those carbs and get the AF set right..
Spark plugs aint gonna do it..

[Gold]

You need to clean those carbs and get the AF set right..
Spark plugs aint gonna do it..

kk where can I find carbs 102 (1999 600 katana) I can't seem to find it now.

[arsenic]

Katana wiki, the link across the top.

[Gold]

You know.. The Weird thing is, it was running ok yesterday.

Does that change anything?