I understand that the '80-'81 carbs have non-adjustable idle mixture screws. And from what I've read, you must clean them out and clear them so they flow freely.
So, I've got the float bowls off all four carbs but I'm unsure of where these little buggers are. I've looked in both my manuals and searched here and elsewhere on the web but can't find these darn things pointed out anywhere.
Can you spot it? Or am I looking in entirely the wrong place?
If that's it, then I have found my poor idle problem. All four of them are hopelessly clogged and are soaking now.
Last edited by Roady on Fri May 23, 2008 5:37 pm, edited 3 times in total.
I am Not an 1100 guy but on the 1000 the 3 inside the bowl are the Primary, the Secondary,and the Idle fuel jets. The Mix screw is on the outside. I have read that the 1100 only has one main inside the bowl. So that leads me to believe that what you have identified as the Idle mix with the question marks is in fact the Idle Fuel jet. I have also read that the mix can be adjusted with the carbs installed (with the proper tools) so that again leads me to believe that the screw head with the lever arm is the Mix adjustment.
I am sure one of the 1100 guys will be along shortly to set us straight
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I think the terms pilot screw, idle mix screw, and fuel/air mix adjusment screw are interchangeable.
The fuel/air or idle mix adjustment is indeed the the sloted head screw on the outside. I cut the the tab off with a dremel tool so it can be adjusted. The tower you have marked with a ? is a dummy tower I guess, doesn't go anywhere. You should be able to remove the jets from the other two towers, the one marked as the "is this the idle mixture screw?" is the idle jet.
Last edited by Brant on Thu May 22, 2008 9:05 am, edited 1 time in total.
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The mixture screw is the one you have marked pilot screw. That tab on it will prevent you from turning it more than about three quarters of a turn once the fuel bowl is on. You have a few choices... first you can remove them clean them and reinstall them before installing the fuel bowl. Or you can dremel tool off the little tab so they can be adjusted with the bowl on. OR you can heat up the little aluminum tab piece with a torch and they will pop right off. Underneath you will find a normal looking brass mixture screw. If you were to buy one of these new from Honda you would get the screw a spring a washer an o ring and the limiter cap. In order to install the limiter cap you would first install the screw and set the mixture, then usr loctite to glue on the limiter cap.
Heat them up and pull off the limiter caps with pliers. Life is easier once they are gone
What you call the pilot screw IS the idle screw. The thing with the protrusion is known as a Limiter Cap,once youve made the initial setting and put the bowls on ,you're"limited" to about 1/2 turn. The caps will pull off. My Honda Shop manual covered all this pretty well. Also when I did my carbs I didn't have to change the initial settings,the bke started and ran very well.
Ron
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The top one is called pilot screw (aka idle mixture screw . where your pointing to as the idle mixture screw is the idle jet (not removable on 80-82 carbs) so you going to have to clean it while still in there. (use brake clean to do that & lots of air)
Hope this helps
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Thanks, guys. My manuals call the one with the tab, "Pilot Screw" or needle. And yes, the procedure to set them is nicely complete.
The #4 screw is bent over at a nice 2º angle. It seats on the carb body, I believe, before the needle seats. It was 1-3/4 turns out while #2 was 2-1/2 turns. I have four sets of K&L "Carb Repair Kit" that came with the bike. Those have new pilot screws without the caps. My books say to replace them all if one is needed. Randakk says to use the old needles and jets.
I plan to use just some of these O-rings and washers but am now debating on using those pilot needles too.
How do I clear those idle jets? They start in the float chambers but where do they go from there?
I have many questions Master.
DO NOT try wire. They are about the size of 2 hairs. The best way is to soak them. ive heard people using tabasco sauce to soften up the crud. they go up into the air cutoff and i think the outside screws with the limiter cap. the best way is to ultrasonic clean them. even when they are open you can hardly see thru them. Those are called the low speed jets also if we are on the same page. JB
jbz........... Thinkin about sh-t too hard and You wont get anything done
Steve,Since you have one bent,if it won't straighten satisfactorily,I would replace them all.
Ron
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Jesus is Lord ! Hope is not a plan
83 Ascempade has become a trike with 1200 fork tubes and Maxda Miata rear suspension.
84 Standard ongoing project
82 Interstate 35k reincarnated as a "Street Tracker"
Thanks Ron, I agree, new ones have gone in and will get the full adjust procedure. JBZ, don't worry about the wire, I'm paranoid about jammin' things in tiny holes. Also thanks to WF, Motnick and Brant.
Here's an update on the carbs.
So, what I've called Idle Mixture Screws in the picture are the Idle or Slow Jets.
Those have been soaking on the bench (between blasts of air) in various caustic chemicals. I've gone thru a can of brake cleaner and 1-1/2 cans of carb cleaner.
They're still soaking. Should I expect this to take weeks? Do I have options?
if you have the aircutoffs out you can try blowing compressed air down thru the port in the air cut off chamber to the low speed jets. sometimes you can get the plastic long tip of the carbcleaner can down into there to expedite it. Ive heard of them being pulled out with a tap as the 80 and 81s are pressed in but never tried it personally.jb
jbz........... Thinkin about sh-t too hard and You wont get anything done
I had one that was clogged and took a week to get cleared. I thought it was never coming out and had been told how to remove it but dont as it is quite risky and if your persistant it will free up. The passage goes to the air cutoff valve and the idle mixture pilot if memory serves. I soaked with carb cleaner and pb blaster, but try and get to an air scource of 125psi or more if possible with a rubber tipped air gun so you get a good seal when blowing. Dont give up and good luck and dont get to
Darren
Thanks again JB. I had already taken off air cutoff #1 so I tried there and !voila! that one is open. Now if I can get to the others without breaking apart the plenum I'll be a very happy camper. If I gotta remove the 4 and do them separate, that's where I'll go with it.
Tallrider, my air source is a can from RadioShack. It might fall a tad shy of the 125 you're talking about. Maybe the Honda dealer would let me use theirs? Y'all can stop laughing now ... they might.
