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What jets? 80 1000g cv34

thebrandonbeezy

thebrandonbeezy

Forum Mentor
Ok so ive been riding the gs to work lately and i finally took it to reline since i put the 4 into 1 on and noticed it has a slight studder from roughly 7800ish on up like its a tad on the lean side. Which would make since since its all stock jetting and has a k&n factory drop in and the 4 into 1 now. Cause before itd pull all the way up no studer. So since the bike runs perfect everywhere in the rpm untill 7800ish i would just like to add a slightly bigger main jet and i see 2 styles so which one is correct for my application also how big would you go? I think i read some where 3 sizes for a good flowing 4 into 1??
 
The large round ones are the ones you need.

You may have a "good flowing 4 into 1", but it might not flow a whole lot more than the stock pipes. Stock GS pipes actually do a good job of silencing the noise without hindering the flow too much, so you might only need a couple sizes for the pipe. Add one more for your K&N filter in the stock box, and you are probably looking for 122.5s. Just to be sure, order a set of 125s, too.

.
 
Awesome thanks buddy, yeah not sure how much better flowing it is but its definitely pushing a tad more up top, cause it never did this with the factory pipes. Although doesn't seem like much flow was gained but still
 
I'd go with the 120 mains and raise the needle by replacing the plastic spacer with 3 metal washers. Don't forget to do a good sync after. You have exactly the same setup I had in the 1000 motor and it worked perfectly.
 
I alread ordered the 122.5 and 125 jets, if its too much ill order the 120s next week. I dont rev out my bike enough to really notice it.. lol ive had the 4 into 1 on for almost 2 months now and just revved it all the way up haha. I did remove the plastic washer a while ago though and midrange picked up a lot!
 
thebrandonbeezy said:
I alread ordered the 122.5 and 125 jets, if its too much ill order the 120s next week. I dont rev out my bike enough to really notice it.. lol ive had the 4 into 1 on for almost 2 months now and just revved it all the way up haha. I did remove the plastic washer a while ago though and midrange picked up a lot!
Click to expand...

If this is the first time you checked the higher RPMs then make sure your ignition system is in good working condition as well since that can cause similar symptoms.

Did you replace the plastic washer with 3 thin metal washers? If you just took out the plastic washer and didn't replace it with a lower stack it will be riding the needle jet way too much. My 1000 would run just a tad rich (as it should) at full throttle using the 120's.
 
Ill take a picture of what i did. I basically flipped the washer to the underside of the clip to raise the needle, i think.. its been like 4 months since i did it. It not the first i revved it out, just the first since installed the 4 into 1. With the stock pipes it'd pull all the way to redline no problem what so ever.
 
TxGSrider said:
Just throwing this out there, but on the CV carbs if you change the main jets, you'll affect the mixture at all throttle openings just above idle, so you may end up fiddling with the needle position a little too. FactoryPro has a pretty good link for to help tune those carbs: http://www.factorypro.com/tech/tech_tuning_procedures/tuning_carbtune,CV,high_rpm_engines.html
Click to expand...

Awesome, thanks for the link!
The website i ordered jets from sells mikuni needles needle jets pilot jets and what not too. Is there a p/n for adjustable needles for these so that i dont have to buy the dynojet kit for the needles??
 
thebrandonbeezy said:
Is there a p/n for adjustable needles for these so that i dont have to buy the dynojet kit for the needles??
Click to expand...
It's not just the position of the needle, but the taper, that makes the Dynojet needles work so well.

I would have to measure some adjustable needles I have to see how much they can be raised, but it's really the more-dramatic taper that does the job so well.

If you want to look for adjustable needles, look for needles from anwhere except the USA. Canadian, Euorpean and Australian bikes all had adjustable needles.

.
 
thebrandonbeezy said:
Ill take a picture of what i did. I basically flipped the washer to the underside of the clip to raise the needle, i think.. its been like 4 months since i did it. It not the first i revved it out, just the first since installed the 4 into 1. With the stock pipes it'd pull all the way to redline no problem what so ever.
Click to expand...

Flipping the shim to under the clip is the same as having no shim at all. Take the plastic spacer out and put three metal shims on top.

They say a picture is worth a thousand words:
r0Evsn.jpg
 
JTGS850GL said:
Flipping the shim to under the clip is the same as having no shim at all. Take the plastic spacer out and put three metal shims on top.

They say a picture is worth a thousand words:
r0Evsn.jpg
Click to expand...

Soon as my jets come in and I have a reasont to dismantle my bike again ill post a picture of what i did. But i do understand what you are talking about.
 
Ok so i got impatient and bought drill bits.. used a number 55 which is roughly a 118 and thats all it took.. shes running like a raped ape everywhere! Seriously holy crap smooth as pie!! Ok so since i have the bigger jets coming i was wondering if it would it be beneficial for power to open up the bottom of the air box with the bigger jets that are coming
 
thebrandonbeezy said:
Ok so i got impatient and bought drill bits.. used a number 55 which is roughly a 118 and thats all it took..
Click to expand...

Congratulations, you now know NOTHING about the jetting on your bike. :clap: :clap:

And pity the next owner, who might put on a pipe that is a bit more "free-flowing" and look at your jets that are stamped 115 and think he will go larger with a 120. Imagine his surprise when there is no measureable improvement.

Do yourself a favor. Splurge. Get a set of 117.5 and a set of 120 jets, you will be out about $15, plus shipping. Then you will KNOW what your jetting is.

.
 
Well the problem is that i ordered jets the night i started this thread and haven't received them. Im out a good bit of money now on jets and quite frankly dont plan on spending more money on them. And of course I would tell the next owner what i did. To assume that i wouldn't is kinda upsetting. I try to be a good person in that aspect, and make sure everything that i know is known to the possible future owner. I dont hide anything. Now i do know that the bike runs its ass off now and the bores of the jets look good. No oblonging or anything. I know its not 118 perfect. But guess what. It runs perfect now. Im fine with 118ish and the next owner will know what i did.
 
Ok before this turns into a bickering load of crap. Steve, i already ordered the jets you previously mentioned. They haven't arrived yet and i do plan to run the smaller of the two. I think it was a 122.5.. i only drilled them just to make sure that it wasn't an ignition issue. It turned out that it was a lean issue and ran like a monster after. Now when i install the 122.5 mains would it be in my best interest to open up the bottom of the air box a little bit to get a little more air to it? Or should i return the 122.5s when they arrive and get smaller ones.
 
No "bickering load of crap" here, just a bit of frustration.

Whenever you are making changes, change only ONE thing at a time. If you change the jets AND open up the airbox, which one helped?
Maybe one of them helped a LOT, but the other one hurt a little, still leaving a net gain, leaving you thinking you did a good job, when it could have been better.

.
 
I haven't done the airbox yet, just drilled the jets. When my jets do come in i was planning on just doing the jets then seeing if it needs more air
 
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