Tired of wasting money on jets!

[Crema28]

I have a 1983 Suzuki GS 750 E. I replaced the stock airbox with airpods. I bought new jets to go with it. The bike is still running terribly. I checked everything else including plugs and its obviously the fuel. I did this twice and now Im stuck with new jets that dont work for my bike. The size that I have in there now is 122.5 main 42.5 pilot. Has anyone else had this problem so far? I just cant figure it out. Do you know what size I need or what worked for you?

 

[blowerbike]

st.3 jet kit is needed to make the motorcycle smooth and more powerful than stock with the factory airbox removed.
when you remove the airbox you have no choice but to spend countless hours/days/weeks trying to jet something that cant be correctly jetted without a st.3 jet kit.
buy a jet kit or reinstall the stock airbox and carb parts.

 

[dr_fosg8]

You mention that the bike is "still" running terrible. Was the bike running bad before the change to pods?

 

[Sunburn]

Jet kit will come with adjustable needles, this is key to get it to run right. It's not just about the main jets.


All the air flow changes when you remove the stock air box.


I re-jetted a stock 89 GSXF-750 I put on a yosh pipe and individual air filters. The dyno jet ket i purchased was great. Came with detailed instructions and trouble shooting. That bike was screeming when I was done. But I had them carbs off more times then I can count adjusting the needles mostly.


With out that jet kit and instructions I would have never got it done.

 

[tejasmud]

Dynojet Stage 3 Kit? Where is the fun in that?

I agree if one would like to make light work of it get the DJ kit, and yes adjustable needles are a key element on tuning. The kit usually costs a good dollar.

Still there is the "Million Dollar Question."

How was the bike running before?

What has been done in regards to carb clean and rebuild, boots and o-rings, carbs being synchronized, and fuel supply condition including tank and petcock?

Bottom line, if these items have not been addressed the bike could still run like crap even with a Dynojet kit.

Not to mention the electrical side of the equation of a fine tuned machine.

 

[Road_Clam]

I have a 1983 Suzuki GS 750 E. I replaced the stock airbox with airpods. I bought new jets to go with it. The bike is still running terribly. I checked everything else including plugs and its obviously the fuel. I did this twice and now Im stuck with new jets that dont work for my bike. The size that I have in there now is 122.5 main 42.5 pilot. Has anyone else had this problem so far? I just cant figure it out. Do you know what size I need or what worked for you?

If you sit tight for about a week, i'm currently working on a large post which is a fantastic Cycle World magazine article from back in '83, which deeply details performance tuning a GS1100 for use with a aftermarket exhaust and the pro's and cons of swapping to pods... stay tuned.

 

[srsupertrap]

If you sit tight for about a week, i'm currently working on a large post which is a fantastic Cycle World magazine article from back in '83, which deeply details performance tuning a GS1100 for use with a aftermarket exhaust and the pro's and cons of swapping to pods... stay tuned.

Road_Clam,

Are you referring to the article, "In Search of Free Lunch" ?

 

[drhach]

He did say "still running terribly". I guess that it means that it ran bad before the modifications. Jetting and needle adjustment is tedious when you do it form scratch. Be patient, take good notes and only change one thing at a time. Make sure your valves and timing are correct. Make sure the carbs are synched. Fix all vacuum leaks. If everything else is not up to snuff, you will get nowhere other than frustrated.

 

[blowerbike]

Run forest run

 

[tejasmud]

LOL! :lol:

 

[Crema28]

You mention that the bike is "still" running terrible. Was the bike running bad before the change to pods?

The bike was running fine before the pods and mods. This is my second time changing out the jets. Thats why I said that its STILL not running correctly. I changed all of the rest of the parts that others mentioned in this thread. Thats the only thing that Im having problems with. Carbs have been cleaned, tuned, synched, rebooted, new plugs,etc,etc. It still isnt running correctly. I turn the throttle and it goes but when I reach a certain speed it garbles and then bursts up to speed. I went through the electricals first and then the fuels. I will try the stage 3 Dynojet kit.

 

[blowerbike]

The bike was running fine before the pods and mods. This is my second time changing out the jets. Thats why I said that its STILL not running correctly. I changed all of the rest of the parts that others mentioned in this thread. Thats the only thing that Im having problems with. Carbs have been cleaned, tuned, synched, rebooted, new plugs,etc,etc. It still isnt running correctly. I turn the throttle and it goes but when I reach a certain speed it garbles and then bursts up to speed. I went through the electricals first and then the fuels. I will try the stage 3 Dynojet kit.

all BS aside...
if you want to have a proper running machine..
your doing the right thing.
its all in the needles but to get the right needles...you have to buy the the ST. 3 jet kit.
dont over think the jet kit..
install as per intructions 100% and see how it acts.
most people want to finger with these kits but only end up wasting time and not having any major gains..
if your at high altitude then some changes are in order.
post back with your results.

 

[Road_Clam]

Road_Clam,

Are you referring to the article, "In Search of Free Lunch" ?

Bingo! I am very impressed! Do you actually still have that mag? Or do you simply remember the article?

 

[srsupertrap]

Bingo! I am very impressed! Do you actually still have that mag? Or do you simply remember the article?

Road-Clam,
Yes I have the article. When I first joined the GS Forum I scanned that article along with several other 1980's How-to's. That was a great article and think we agree it's worth reading if for nothing else to appreciate how much easier it is to jet GS carbs by simply buying a DJ Jet Kit. When younger GSer's read the article and find the jetting solutions back then were really limited ie, "Let's try a set of needles from a XS11, I think they fit and are thinner too"

Opps got off on a tangent, heres the article. Hey the article even has a drawing of a GPZ1100 engine!

http://www.thegsresources.com/_forum/showthread.php?t=118266&highlight=search+free+lunch

 

[Road_Clam]

Road-Clam,
Yes I have the article. When I first joined the GS Forum I scanned that article along with several other 1980's How-to's. That was a great article and think we agree it's worth reading if for nothing else to appreciate how much easier it is to jet GS carbs by simply buying a DJ Jet Kit. When younger GSer's read the article and find the jetting solutions back then were really limited ie, "Let's try a set of needles from a XS11, I think they fit and are thinner too"

Opps got off on a tangent, heres the article. Hey the article even has a drawing of a GPZ1100 engine!

http://www.thegsresources.com/_forum/showthread.php?t=118266&highlight=search+free+lunch

too funny, I never knew that article made it to a post within GSR. Well, I guess there goes 4 hours of typing down the drain. That article needs to be made into a sticky !!!! I can't tell you hown many new GS'ers (and many old experienced ones as well) ask over and over "how come my bike runs so crappy with pods" That article gave my a whole new educated perspective on intake air flow, and how mods affect the air flow....

I'm actually almost done typing the article, maybe I should just finish it and make it a quick readable post anyways...

 

[sonnygs1100]

all BS aside...
if you want to have a proper running machine..
your doing the right thing.
its all in the needles but to get the right needles...you have to buy the the ST. 3 jet kit.
dont over think the jet kit..
install as per intructions 100% and see how it acts.
most people want to finger with these kits but only end up wasting time and not having any major gains..
if your at high altitude then some changes are in order.
post back with your results.

ive found if you have an adjustable exhaust like supertrap or kirker you can fine tune both jet kit and exhaust for a few extra ponies but it helps if you have acsess to a dyno machine and half a day :dancing:

 

[blowerbike]

ive found if you have an adjustable exhaust like supertrap or kirker you can fine tune both jet kit and exhaust for a few extra ponies but it helps if you have acsess to a dyno machine and half a day :dancing:

good point but.......
why do you think these cheeeeeep azzes around here are just putting main jets in these?
its hard enough trying to get them to buy a buck and a quarter jet kit.
they would squeal like a pig if they had to fork over dyno time cash:twistedevil:

 

[TheCafeKid]

too funny, I never knew that article made it to a post within GSR. Well, I guess there goes 4 hours of typing down the drain. That article needs to be made into a sticky !!!! I can't tell you hown many new GS'ers (and many old experienced ones as well) ask over and over "how come my bike runs so crappy with pods" That article gave my a whole new educated perspective on intake air flow, and how mods affect the air flow....

I'm actually almost done typing the article, maybe I should just finish it and make it a quick readable post anyways...

Id appreciate it Rich. Im on wifi pickup from someplace broadcasted nearby and its intermitant at best. Ive not been able to D/L that PDF to read the article before my connection craps out. Since you already went to the trouble to type it up, id LOVE to see it. It might even end up in my "Carb Tuning Bible" ive been putting together based on my own experiences and tons of input and articles from other GSR and sources... Thanks man!

 

[TheCafeKid]

all BS aside...
if you want to have a proper running machine..
your doing the right thing.
its all in the needles but to get the right needles...you have to buy the the ST. 3 jet kit.
dont over think the jet kit..
install as per intructions 100% and see how it acts.
most people want to finger with these kits but only end up wasting time and not having any major gains..
if your at high altitude then some changes are in order.
post back with your results.

I had a dog. And his name was BINGO!!!

You can play with jets for the rest of your life on the CV carbs to try to tune for pods, forget the pipe, its the least of the worries... But the bottom line is simply that the STOCK MiC needles will NEVER work with pods. They simply cant deliver the fuel fast enough in the midrange, and 9 times out of 10 thats where people complain about the bike falling on its face~the pilot to needle transition and on. You can shim the stock needles, it might help some, but the taper is just not "fast" enough to get the gas there when it needs it. I suppose you could even buy some old "VM" style sharp needles from Sudco or something, guessing at what you need, and spend a bunch more money and time doing that, and MAYBE SOMEDAY you'd get damn close. But, as ive said after attempting to jet CV carbs by hand for pods for MONTHS and only getting frustrated and wasting my time. I will NEVER EVER EVER hand jet a set of vaccum carbs by hand if the DJ kit is available again. No offence, but its just stupid. Seriously, if you spend the money for the kit, install it, and then fine tune it, you'll see how QUICKLY you dial that sucker in, and you will smack the chit out of yourself for not doing it sooner. Will it be perfect? Nope. Never will...I still battle for perfection. Its not going to happen. But it will be DAMN CLOSE, and very VERY rideable and noticably more powerful. Alls i gots to say is Thanks Terry for hitting me with that 2x4 of knowlege and realization that one LAST time....

 

[sonnygs1100]

good point but.......
why do you think these cheeeeeep azzes around here are just putting main jets in these?
its hard enough trying to get them to buy a buck and a quarter jet kit.
they would squeal like a pig if they had to fork over dyno time cash:twistedevil:

ok sorry , ive been riding harleys and buells to long to worry about a buck and a quarter :-\\\