Pods, Pipes, Panic! (Help! Your Bike has Pods)

[wally]

I bought a pair of Uni double foam filters and a 6-Sigma jet kit. They supplied two sizes of main jets, pilot jets, a couple of drill bits in case I wanted to do wilder mods (which the instructions warn repeatedly can cause low speed/throttle drivability problems and should only be performed for racing purposes), and several shims for the fuel needles, as well as a pretty good set of instructions. The kit was reasonably priced ($56 shipped for a two carb kit) and they sent me an email asking about any mods and normal riding elevation.

SoHum, let me know how the jets work. Contemplating a set, but with our really crappy exchange rate it is a bit pricey!

thanx!

 

[Big T]

Guys, this is an informational stickie

You should read it and post up your problems in the forum below, not here

 

[boris.h]

Ok so I'll try to ask smg about pilot and air screws settings when pods and 4/1...
In my '79 gs 550 (VM22 carbs), I had to put larger main jets, and raise the needles... ok for them.
About pilot (fuel) and air screws, Do I have to keep the standard settings or adjust them to increase the air / fuel flow when idling to avoid dying at idle?
I mean, standard setting to have the good air / fuel setting is air screw -1.5 turn / fuel screw -5/8 turn. Do I have to put for example a similar setting (but with more amount of air / fuel) like air screw -3 turns / fuel screw -1.25 turn?

This is for pods and 4/1 exhaust...

thanks!

 

[Jlorello]

Hello i have a 81 450 with slip on jigh flow exhaust tips and pod filters i was looking at getting a jet kit from 6 sigma anyone bought from these guys wanted to know how there quality of the kits are

 

[TDC311]

I have a jet kit, I ordered from them about 2 years ago, in my 1979 GS 750E. I had re-jetted when I put generic ebay pods on my bike, but when one popped off and blasted me in the leg at like 70mph, I decided to invest in some K&N pods. However, in doing so my bike would not run with the now increased air flow so I wasn't sure what to do next and I needed an answer fast so I found the 6 sigma kit on ebay. They asked me about my exact location and modifications and sent me a kit tailored to my bike and atmospheric conditions.

The kit had easy to follow instructions and told you where to set the needle with the "e-clip" and everything. However the installation was really easy for me since I have the VM carbs, depending on your carbs you may need to use the drill bit that comes with the kit.

One interesting note about that kit from them was that they even thought about different jets for the inner cylinders vs the outer cylinders which I found really interesting. I don't remember them proving an exact explanation but I believe it would be due to the fact that these engines are air-cooled so the inner cylinders can get hotter than the outer so they provide slightly bigger jets for the carbs for the inner 2 carburetors. I am not sure if that is a normal practice or not.

They even provided an alternate set of jet sizes in case the first ones weren't quite what you needed.

 

[TxGSrider]

Hello.I have a question to the carburator wizzards. This is a dyno run from my GS750 1977 Uni filter pods, open exhaust. Pilotjet 15, Mainjet 117.5, fuelscrew 2 turns ,air screw 1.75 turn, needle one notch from downside. So needle can move one higher.
It runs not bad however runs a bit lean on the lower revs. Float level standard . What should I do to make it a bit better?
View attachment 46629

I don't have as much experience with jetting cv type carbs as most of the people here, but I have jetted several regular style carbs using a wideband. I know on a cv carburetor working correctly that the slide isn't open all the way until the engine rpms are high enough to use the additional air. So if your carburetor slide is less than fully open it is using the needle to regulate the amount of fuel entering the engine, I would sure try raising the needle and it should help.
And that is really lean at low rpms...

 

[Guest]

Hey guys,

so ive got my bike torn halfway apart and just started to put here back together. 1978 gs750. I will be running delkevic 4-1 exhaust and K&N pods. I did a full carb tear down, cleaning, orings/gaskets/fuel tubes, re jet (120 main/17.5 pilot) and jet needle moved one notch richer.

I guess my question is: should I start with stock fuel and air screw settings as a benchmark or does anyone have a similar setup that really purrs through the gears, and is willing to share their settings as a better starting point

also I'm installing SS exhaust studs to replace stock bolts.. I've read that you go locktite stud to head , and anti seize on the nuts. Is this correct??

thanks for the space and your time
andrew r

 

[Steve]

No personal experience with your particular setup, but the general concensus is to go 1 turn out on the fuel screw (the one on the bottom) and 1.5 to 1.75 turns out on the air screw (the one on the side). After it warms up enough to run without "choke", use the air screws to fine-tune the mixture for best idling.

.

 

[Jmcb]

Perhaps a dumb question. But I have a 1978 gs550. Are there any aftermarket air filters that are perhaps a bit lower profile and smaller then the stock air box that do not require re-jetting?

 

[aclaytonb]

Not that I've found.

 

[swampig]

That would be correct the inner cyls need to run a little richer as it helps with the cooling you may also find tho that the rings wear a little faster but its negligable and will possibly not be noticable on a normal mildly tune bike

 

[Yozzer74]

Hi my bike is gs550ex c.f. carbs custom 4into2 pipe k&n pod filters. I've got denoted kit stage 3kit on needle set on 4th notch down 155 main jets .bike runs crap feels like it's not getting fuel .had it on dyno and this was the results .

 

[TxGSrider]

Hi my bike is gs550ex c.f. carbs custom 4into2 pipe k&n pod filters. I've got denoted kit stage 3kit on needle set on 4th notch down 155 main jets .bike runs crap feels like it's not getting fuel .had it on dyno and this was the results .View attachment 55284

Looking at that chart it looks lean. Personally I would use all the same size main jets instead of using larger on the inside cylinders if youre using pods. If you buy larger mains, remember that the DJ mains are sized differently. This can help http://www.jetsrus.com/FAQs/FAQ_mikuni_vs_dynojet_vs_keihin_sizes.htm

 

[red1100]

I?m getting ready to rebuild the carbs on my 83 1100E. Last time they were off was in 1984 when the exhaust and pods were put on. This will be the first actual rebuild.So the jetting is spot on but is anything changed or updated significantly since then? Have my bottle brush looking carb cleaners and am ready to go. I?m right at 45,000 one owner miles.

 

[Big T]

Guys,

This sticky is an informational thread for you to read

DO NOT post up your questions or experiences here

Start a new thread below for your problem or question

 

[Guest]

Thats the coolest thing I ever saw

oh, hell yeah! i got your dinojet right here!

 

[Piers Pitcher]

Hello Newbie here.

Has anyone had success with finding a replacement exhaust for a 1981 GS1000G?

 

[ironbiker]

P.S: and remember always adjust the valves...FIRST

 

[ironbiker]

Working on '80 8 valve 1000,bought new,adjusted valves (PITA),changed diaphragms,main jets at 140,new plugs,rewired coils from relay,carbs overhauled in Texas 18 months ago,got pods and 4-2 Jardine exhaust,got spark on all 4.Crank up and no gas to #2 and #4,had carbs off 2 or 3 times removed jets and blew air through them,I want to ride but about to give up,wife bitchin about money and time spent on it,it's too old.Maybe another carb set...running out of time.Resized pilot one size larger..found 1 missing on #2,raised needles about a 16th,idles and revs,Life is good:joyous:.

 

[1978GS750E]

Guys,

This sticky is an informational thread for you to read

DO NOT post up your questions or experiences here

Start a new thread below for your problem or question​

"Courtesy of BigT"