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83GS550E Pilot AIR jet which one???

  • Thread starter Thread starter GQROD
  • Start date Start date
GQROD said:
I can't thank you enough for your offer i sincerely appreciate your being so generous. I'm sure a bike will run fine with 155's because the numbers are not that far off from stock adn when the mixture screws are turned to adjust the idle it falls within the range of adjustibility. So it could be why no one checks these. I just wanted to make sure i did it right so i didn't have to waste any members time on common sense stuff. If you have #145 air jets please let me know how much and i would be interested. Thank you again for your help.
Click to expand...

Well, got good news and bad news... (ain't that always the way?):

Good: One of my carb sets has 145's in it! (So far, in each of three sets of carbs there have been three different sizes - #1 has 155's, #2 has 150's, #3 has 145's and that's not considering my 4th set which is on the bike, but now I'm really curious as to what those are).

So, here's the bad news: I could only get two of the 145's out of the carbs. The worse news, after sitting in PB Blaster for 24 hours the slot on the other two jets just ground right off without the jets budging at all, so I think they're done.

If you're interested in the two jets and/or the carbs in general, PM me.

Sorry the news isn't better. :(
 
Just the fact that you tried means a lot to me knowing that a fellow member would go through to that much trouble to help me out! I sincerely appreciate the effort.
I at least hope this question has raised some eyebrows and awareness of this jet in the possible cause of idle problems for this model which those of us seem to have in common and can hopefully cure it so we can all enjoy riding and not just repairing these great bikes.

PM sent.
 
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I've had good luck getting pilot jets and stuck air mix screws out with the Sears "easy out" kit and a steady hand on a reversible drill press... Not the best use of all the equipment but it's worked for me....

Kinda wish I woulda tried it first before I broke a set of carbs and seriously screwed the threads in another set.
 
skreemer said:
I've had good luck getting pilot jets and stuck air mix screws out with the Sears "easy out" kit and a steady hand on a reversible drill press... Not the best use of all the equipment but it's worked for me....

Kinda wish I woulda tried it first before I broke a set of carbs and seriously screwed the threads in another set.
Click to expand...

I can agree with you on that skreemer believe me i know what a headache it is when even the drill bit or the extractor strip trying to get out frozen bolts and jets. I did strip two jets trying to remove them with just the drill, but a drill press does make it much easier to do this, which is why i recommended the bull dog brand on another thread but any brand that works is definetly worth mentioning on this site since we all go through this more than once in our projects, thanks for the advice on the sears brand.
 
RE: "Easy out" or "back out" tools for jet extraction.

I've got a back out set but I didn't want to use is on the jets b/c I assumed that the soft brass of the jets would be at risk of damage from the hardened steel of the back out bit. Wouldn't any damage to the interial of the jet effectively up-size the jet and effectively make it useless or at least un-sizeable?
 
MelodicMetalGod said:
RE: "Easy out" or "back out" tools for jet extraction.

I've got a back out set but I didn't want to use is on the jets b/c I assumed that the soft brass of the jets would be at risk of damage from the hardened steel of the back out bit. Wouldn't any damage to the interial of the jet effectively up-size the jet and effectively make it useless or at least un-sizeable?
Click to expand...

I think the people using this technique are just wanting to get the jet out and are not intending to reuse it.
 
Yes you are right, there is no easy way to get a jet out adn still have it useable. This method is just to get the old jet out without runing the threads in order to put a new one in.
 
Just wanted to update teh progress on the jets.
1- I found the old jets size #150

2- Bike runs VERY lean. Plugs show signs of blistering, insulator is pure white.

3-Does not start unless the throttle adjusment knob is turned all the way in ( for highest idle speed ) then it races too high adn needs to be turned down, however it will not hold an idle!

4-Chances are the size #145 is CRITICAL! or i wll have to go smaller to maybe #135 or even #130 Main Pilot Air Jet if it is still runs too lean.

5-Adjusting mixture screws had no effect on plug readings. Still lean!

6-Adjusting choke had little to no effect on idle speed.

7-Plugs are 9EA stock for this bike with the smallest gap allowed.

8-Hangs up when throttle is blipped so it is still lean. I will have to wait to get the jets and try all the above size ranges but it does seem this is the last and crucial step to a good idle since the plug readings are so dramaticly different from what i had encountered before.

9-Hope this helps our "splinter group" with the twin carb set-up.

10- Hi melodic i sent you a pm on those carbs.
 
GQROD said:
Just wanted to update teh progress on the jets.
1- I found the old jets size #150

2- Bike runs VERY lean. Plugs show signs of blistering, insulator is pure white.

3-Does not start unless the throttle adjusment knob is turned all the way in ( for highest idle speed ) then it races too high adn needs to be turned down, however it will not hold an idle!

4-Chances are the size #145 is CRITICAL! or i wll have to go smaller to maybe #135 or even #130 Main Pilot Air Jet if it is still runs too lean.

5-Adjusting mixture screws had no effect on plug readings. Still lean!

6-Adjusting choke had little to no effect on idle speed.

7-Plugs are 9EA stock for this bike with the smallest gap allowed.

8-Hangs up when throttle is blipped so it is still lean. I will have to wait to get the jets and try all the above size ranges but it does seem this is the last and crucial step to a good idle since the plug readings are so dramaticly different from what i had encountered before.

9-Hope this helps our "splinter group" with the twin carb set-up.

10- Hi melodic i sent you a pm on those carbs.
Click to expand...

FYI: Been short on time the last day or so. Will get pics of the carbs and pulled jets sometime today.

It makes perfect sense that adjustments to the pilot screws (mix screws) don't effect the lean condition as it sounds like that condition is not likely at idle. However, have you considered ajusting the main jet needles to open up the main circuit capacity? Also, have you ensured that you're air intake is sealed (no vacum leaks)? Just some thoughts that came to mind.

Taking a look at one of your other threads, it seems that you were originally experiencing a rich condition? Have you made changes that might have brought on the change?
 
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MelodicMetalGod said:
FYI: Been short on time the last day or so. Will get pics of the carbs and pulled jets sometime today.

It makes perfect sense that adjustments to the pilot screws (mix screws) don't effect the lean condition as it sounds like that condition is not likely at idle. However, have you considered ajusting the main jet needles to open up the main circuit capacity? Also, have you ensured that you're air intake is sealed (no vacum leaks)? Just some thoughts that came to mind.

Taking a look at one of your other threads, it seems that you were originally experiencing a rich condition? Have you made changes that might have brought on the change?
Click to expand...


All great thoughts, since the plugs are so lean i thought of going to bigger pilots but i want to make sure i get the right size air jets in order to have a baseline for comparison.

I originally bought 1.0 mm air jets installed them and had a rich condition yes. That is how i knew they were the wrong jets.

1-Now that the plugs are NOT sooty i need to get it to idle in order to put the carb tune on it and see how each cylinder is burning at idle.

2-The only change i made from before was to install the #150 air jets that originally were in the carb, thankfully i see a major diference and can now proceed onto the next smallest air jets in increments of 2.5 in order to see if the mixture gets better. If not i will go one size higher on the pilots and read the plugs to see if there is a difference.

3-I double checked for leaks around the boots, airbox etc. and could not find a leak. O-rings are new oem from suzuki dealer.

4-I cannot adjust the needles to my knowledge since these do not have the multiple grooves on the needles of the earlier bikes, which means that these carbs are more dependant on the amount of air coming in from the air jets and the amount of fuel from the pilot jets to attain the proper idle mixture.

5- It's difficult since it will not idle long enough to do proper adjustments. Hopefully the new jets will alleviate this.

6-Thanks again for taking time to help me out and yes i am interested in the carbs, i'll take both first sets you mentioned in the pm.
 
FYI: GQROD, PM sent regarding pics of the extra carbs. See the pics HERE.


Sounds like you've covered all the bases I can think of. Hopefully the new jets will get things headed in the right direction.
 
Thanks again for your help. PM sent.

1- I have not taken a compression test yet and will do so to make sure things are good.

2-Valves are alerady adjusted to .13 mm, so the next thing is to check cam timing and ignition timing just to make sure the PO did not mess with this.

3-After the jets this is the last thing i can think of. I will keep everyone posted on the progress. Thanks again for all your advice.
 
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