82 gs750 6 sigma stage 3 kit problems

[Guest]

Hey, I've got a 82 gs750. I put a 6 sigma jet kit on it and can't get it to run right I'm stumped, the carbs were soaked and cleaned so I know they are good, I also just set the valves, I have k&n pods, stock exhaust 135 jets on cylinder 1&4 and 137.5 on 2&3 just as instructed, 47.5 pilots, and 160 air, I have tried the mixture screw
For 1 turn to 4 turns. bike idles beautiful, does have a high idle that will go away after sitting a minute at idle. but if I rev it hard, it will just spit and sputter and stumble, and rev a little maybe 2k max then spit n sputter in a cycle if I kinda play with the throttle it will rev all the way, once it's in higher rpm it revs fine, so I taped half the breathers and it runs better which would me to much air normally? But ain't the main jets already huge to accommodate the pods, also under load if I lay into it it will kinda vog and stay the same if I ease into it it will shoot like a rocket. Do I need to go up more jet sizes or find different filters the k&n pods say high flow on them did I order the wrong pods, should I get different filters. I know you guys hate these questions, but I've read this form for 3 days before deciding to ask I've done everything in the stickeys to do before asking, I'm thinking bigger mains? But like I said the feel 135 & 137.5 are pretty big. It's drinkingfuel it seems please any advicewould be greatlyappreciated and if it doe sputter need bigger jets I apologizefor this post

 

[Guest]

Also I have no leaks anywhere tested heavily with carb cleaner

 

[Guest]

Also new petcock, I line fuel filter clean fuel, and when I took the carbs apart they didn't have the pilot rubber plugs in, I installed new ones that came with the rebuild kit are they supposed to have the rubber plugs over the pilot jet

 

[timebombprod]

I'd just go back to an airbox and stock jets but if you want to run pods I'd say get an exhaust to match the flow. Just wait for more opinions and also answers to help

 

[Guest]

Stock air box was already gone when I got the bike and I'm 180 in the filters and 90 in the jet kit to much money to go back lol

 

[Big T]

The problems you're having are related to needle size/position
Main jets have zero effect under half throttle

 

[Guest]

this is my needle the instructions said to add shims under the clip but adding shims under the clip would not change the needle height so I removed the plastic spacer on the top and put the smaller shim on that came with the kit

 

[Guest]

this is the instructions it also had me drill the vacuum hole bigger in the slide, so do you think I need to put the needle back to stock height, I've tried it with no shim on the top (removed the stock one) then put one half the thickness of the stock on, haven't tried it with the stock on yet in the first pics could that be my problem the needle is up to high? The instructions said it needs to be raised up for the kit

 

[Guest]

I know in the dynojet kits they have you sand the needle down to a smaller point do you think that I should thin it down

 

[Guest]

In the one sentence in the instructions it says "the threaded needle retainer may need to be filed/shaved by .050 what does it mean by the threaded needle retainer, is that referring to the plastic that goes on top of the needle then held into place by the snap ring

 

[Guest]

And the issue may be closer to the 3k to 4k rpm range

 

[Guest]

here is what it's doing if I hold the throttle it will cycle rev up a little then bog pretty the same as me giving it throttle

 

[Guest]

Anyone? If it's in the needle anyone have an idea of what I need to do, I've raised and and put it back to stock

 

[Guest]

Also the floats are adjusted about as high as I can go without it overflowing

 

[tom203]

You said it came without stock airbox setup, what was the jetting setup - mikuni ? Did it run when you got it?

 

[Guest]

No didn't have a airbox when it was stock jetting it ran but now the greatest, so I ordered k&n pods and a 6 sigma stage 3 jet kit to go with the pods because I couldn't find a stock box for a reasonable price, and I'm messing with it no just started it, but the hesitation seems to be right at or before 4000 rpm

 

[Guest]

If I give it about 1/4 to 1/2 throttle and hold it will rev a little past 4k then drop down to about 3200 then full rev

 

[Guest]

Now it's rev past 4k fine and gets a little choppy around 7k and has a hanging idle I've been messing with this bike for a week straight have tried everything but it still won't seem to run right

 

[Guest]

Mixture screws are at 3 turns out

 

[Guest]

If anyone is close to brazil indiana and can figure this thing out I'll pay you to get it running right lol