OK, OK, OK... I give!

[car99r]

I got the Dyna coils (green) installed and the Dyna S igntion. I pulled the carbs and cleaned them real good. Not my first time cleaning carbs but my first time ever removing carbs and installin ghtem on a GS... WOW!!!

Now my problem is I can start the bike and run it as long as I am srpaying ether or carb cleaner in little squirts into the air box.

It will not start without this nor will it stay running when I quit. I checked the bowls and definately getting fuel. I checked compression and all good there.

I keep reading about faulty ignitions... Could this be an issue here? Sound familiar to anyone? It was doing the same thing before pulling carbs and cleaning them. Almost like I am not getting fuel because I know I am getting spark. However, the bowls have fuel in them and I know I cleaned the jets real good.

Anyone have a thought on where to start?

 

[rustybronco]

How well did you clean the choke passage(s) in the flat bowls? did you spray carb cleaner through those passages to check and see if they're unobstructed?

 

[Guest]

Install new plugs and check to see if they have good spark.

 

[Nessism]

Make sure the airbox is installed and the pilot jets are open (hold them up to a light and make sure the orifice is open). If the bike fires with ether the problem is most likely carbs, not spark.

 

[mike_of_bbg]

So if you do that for a while (spray and keep it running), do all the pipes get hot? Is the airbox closed? Tightly sealed? Air filter in place? She won't run right if you're leaking air, though you may be able to compensate with some extra fuel.

 

[dcil]

did you use spray carb cleaner or disassemble them and dip them. I've learned the hard way, only dip them. Otherwise you just killin time

 

[car99r]

How well did you clean the choke passage(s) in the flat bowls? did you spray carb cleaner through those passages to check and see if they're unobstructed?

I made sure to clean the choke passages real good.

Install new plugs and check to see if they have good spark.

Got new plugs and getting good spark.

Make sure the airbox is installed and the pilot jets are open (hold them up to a light and make sure the orifice is open). If the bike fires with ether the problem is most likely carbs, not spark.

Well, airbox is installed but the airbox boots ar enot on all the way. Fought them for over an hour with lube and all and can't seem to get them back on. Figured I would get something even if it ran rough.

So if you do that for a while (spray and keep it running), do all the pipes get hot? Is the airbox closed? Tightly sealed? Air filter in place? She won't run right if you're leaking air, though you may be able to compensate with some extra fuel.

Yes, all of the pipes are getting hot. I figured she would run rough because I need new filter and air box not sealed up well. I have never ran into a bike that at least would not run when giving throttle. Although it would normally run rough but at least start.

did you use spray carb cleaner or disassemble them and dip them. I've learned the hard way, only dip them. Otherwise you just killin time

I used spray cleaner and air. Same thing I have done about a thousand times on other bikes? Am I missing something as why dip only and not spray?

 

[car99r]

Any secrets or tips on getting air box boots onto the carbs with them in place?

 

[850 Combat]

Make sure the airbox is installed and the pilot jets are open (hold them up to a light and make sure the orifice is open). If the bike fires with ether the problem is most likely carbs, not spark.

+1

If it fires, the part that lights the fire is lighting the fire. If it needs you to keep spraying fuel into the carbs to keep it firing, and starting fluid counts as a fuel, look there.

 

[jrh246]

Try this

Try this

Pull the full choke and then try too turn over. Afterwards immediatly pull one of the plugs and see if it is wet. If it is dry the you know there is no fuel getting to the plugs and if it is wetthen it is most likely the airbox. The gs bikes to tend to have problems if the vacuum created by the airbox is not working properly. Hope this helps.

 

[sachsaca]

I'm gonna say what all the old members here say every time something begins to happen, did you adjust the valves? It is a thread line that almost always gets asked. Don't ask me about doing it, I'm just about to begin on mine like you have.

 

[Guest]

Got new plugs and getting good spark.

Soak the carbs(unassmbled), install the airbox and be done with it.

 

[BassCliff]

Any secrets or tips on getting air box boots onto the carbs with them in place?

Hi,

Use a little lubrication (silicone spray, axel grease, 3-n-1 oil, whatever). New boots help a lot. When I replaced my intake boots (carb to head) and airbox boots (airbox to carbs) they practically jumped together. If you'd like to check out my experience, there's a guide on my website (for my 850). What bike do you have? Please put it in your sig so we don't have to ask or go searching through your old posts.

Also, you just can't take shortcuts. There are tried and true, proven methods for cleaning the carbs, adjusting the valves, etc, everything it takes to get these classic bikes running like a top. It's all in your mega-welcome. Or you can click on the "READ ME" file on my website. Keep us informed.


Thank you for your indulgence,

BassCliff

 

[car99r]

Sorry, will put the bike in my sig. It is an 82 GS550L.

I am going to work on getting the airbox on good and sealed up tomorrow. Had to call it a day today due to the nasty four letter word...

Just to answer a few questions above though.

No, I did not check the valves so I think I will pull the carbs back out tomorrow and do that. Double check all passages on them while out and make sure cleaned well.

Then work on getting carbs back in and airbox boots on... Didn't think about vacuum created from airbox... Even when the lid was on I did not have it secured.

Gonna give it one more try...

 

[Matchless]

You probably know this, but pull out the choke fully, dot NOT twist the throttle at all until it is running well. If you are goosing the throttle while starting it tends to do exactly what you are getting.

 

[car99r]

You probably know this, but pull out the choke fully, dot NOT twist the throttle at all until it is running well. If you are goosing the throttle while starting it tends to do exactly what you are getting.

Nope, I didn't know that... Probably have it flooded now so will give that a try tomorrow.

 

[DanTheMan]

Nope, I didn't know that... Probably have it flooded now so will give that a try tomorrow.

Actually, you probably don't have it flooded if you were twisting the throttle while trying to start it. If it's getting fuel through the choke circuit and you try to start it now without using the throttle it should start. Unlike auto carburetors, side draft carbs of any sort do not flood with repeated throttle input. They require the vacuum produced by the engine to draw fuel through the jets into the combustion chambers. If you ever get your hands on an old MG or other European car you'll find the same style of carbs installed there, but they'll be either SU or Stromberg.

 

[ddaniels]

You might try removing the airbox, securing it to the removed carbs off the bike, then install both together onto the bike.

 

[Theo]

I've read t that people have had luck heating up the boots with a heat gun or hair dryer until they are nice and soft and then the carbs should slip right in. Just make sure not to heat them up too much, or risk melting them.

 

[car99r]

You might try removing the airbox, securing it to the removed carbs off the bike, then install both together onto the bike.

Sound slike agood plan but it appears this airbox is all one piece and not sure I could get it back in that way. Also not looking forward to removing all the electrical either but if the below doesn't work and I keep my patience in check and don't burn the fugger to the ground I will give it a shot...lol

I've read t that people have had luck heating up the boots with a heat gun or hair dryer until they are nice and soft and then the carbs should slip right in. Just make sure not to heat them up too much, or risk melting them.

Planned to try that tomorrow morning. We'll see how it goes!