choosing jet size?
Club Member
Joined: Feb 2007
Posts: 16,320
Likes: 306
From: Boynton Beach, FloriDuh
RE: choosing jet size?
ORIGINAL: kawsakimx6
that is what i am thinking. the only thing that worries me is that Hooker told me to change both of them
ORIGINAL: Sundog
I could be FOS, but isn't the drill bit that comes with the Dynojet kit for drilling out the EPA plug? Read the instructions. A Stage I set-up probably doesn’t want a bigger low-speed jet.
From my experience, don't go overboard. Stay to the lean side initially and open the mixture screw a half a turn or so. That will help with the cold stumble. You may just want to raise the needle a bit by putting a couple of shim washers under where it sits in the diaphragm. Thats what they do with the Riceburners.
Good time to put one of those nice shinny carb tops on it too. And get rid of those cross-recessed screws while you're at it and put some socket head cap screws in there.Top and bottom. Get stainless-steel ones and they won't galvanize in and it will go easier the next time you go in. If you want, you can polish them on a grinder with a rouge wheel and the look better than chrome.
At least you only have one to dowith a Sporty. My other bike has four carbs and then you have to synchronize them.
Get a manual if you don't already have one and enjoy yourself. The"professional" at the shop probably isn't as bright as you are, and doesn't give a sh*t either.
I could be FOS, but isn't the drill bit that comes with the Dynojet kit for drilling out the EPA plug? Read the instructions. A Stage I set-up probably doesn’t want a bigger low-speed jet.
From my experience, don't go overboard. Stay to the lean side initially and open the mixture screw a half a turn or so. That will help with the cold stumble. You may just want to raise the needle a bit by putting a couple of shim washers under where it sits in the diaphragm. Thats what they do with the Riceburners.
Good time to put one of those nice shinny carb tops on it too. And get rid of those cross-recessed screws while you're at it and put some socket head cap screws in there.Top and bottom. Get stainless-steel ones and they won't galvanize in and it will go easier the next time you go in. If you want, you can polish them on a grinder with a rouge wheel and the look better than chrome.
At least you only have one to dowith a Sporty. My other bike has four carbs and then you have to synchronize them.
Get a manual if you don't already have one and enjoy yourself. The"professional" at the shop probably isn't as bright as you are, and doesn't give a sh*t either.
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Road Warrior
Joined: Jun 2007
Posts: 1,338
Likes: 0
From: NC....Charlotte
RE: choosing jet size?
ORIGINAL: cHarley
With your pipes and A/C combo I will bet you will need BOTH jets. In fact, you likely will need the pilot (low) jet more that the high jet. Listen to Hooker
ORIGINAL: kawsakimx6
that is what i am thinking. the only thing that worries me is that Hooker told me to change both of them
ORIGINAL: Sundog
I could be FOS, but isn't the drill bit that comes with the Dynojet kit for drilling out the EPA plug? Read the instructions. A Stage I set-up probably doesn’t want a bigger low-speed jet.
From my experience, don't go overboard. Stay to the lean side initially and open the mixture screw a half a turn or so. That will help with the cold stumble. You may just want to raise the needle a bit by putting a couple of shim washers under where it sits in the diaphragm. Thats what they do with the Riceburners.
Good time to put one of those nice shinny carb tops on it too. And get rid of those cross-recessed screws while you're at it and put some socket head cap screws in there. Top and bottom. Get stainless-steel ones and they won't galvanize in and it will go easier the next time you go in. If you want, you can polish them on a grinder with a rouge wheel and the look better than chrome.
At least you only have one to do with a Sporty. My other bike has four carbs and then you have to synchronize them.
Get a manual if you don't already have one and enjoy yourself. The "professional" at the shop probably isn't as bright as you are, and doesn't give a sh*t either.
I could be FOS, but isn't the drill bit that comes with the Dynojet kit for drilling out the EPA plug? Read the instructions. A Stage I set-up probably doesn’t want a bigger low-speed jet.
From my experience, don't go overboard. Stay to the lean side initially and open the mixture screw a half a turn or so. That will help with the cold stumble. You may just want to raise the needle a bit by putting a couple of shim washers under where it sits in the diaphragm. Thats what they do with the Riceburners.
Good time to put one of those nice shinny carb tops on it too. And get rid of those cross-recessed screws while you're at it and put some socket head cap screws in there. Top and bottom. Get stainless-steel ones and they won't galvanize in and it will go easier the next time you go in. If you want, you can polish them on a grinder with a rouge wheel and the look better than chrome.
At least you only have one to do with a Sporty. My other bike has four carbs and then you have to synchronize them.
Get a manual if you don't already have one and enjoy yourself. The "professional" at the shop probably isn't as bright as you are, and doesn't give a sh*t either.
Club Member
Joined: Feb 2007
Posts: 16,320
Likes: 306
From: Boynton Beach, FloriDuh
RE: choosing jet size?
ORIGINAL: kawsakimx6
that is what i was thinking. So i can not use the Dynojet. I did look into the store you told me too, and asked them if they can get me the jets, I am waiting to hear back
ORIGINAL: cHarley
With your pipes and A/C combo I will bet you will need BOTH jets.In fact, you likely will need the pilot (low) jet more that the high jet. Listen to Hooker
ORIGINAL: kawsakimx6
that is what i am thinking. the only thing that worries me is that Hooker told me to change both of them
ORIGINAL: Sundog
I could be FOS, but isn't the drill bit that comes with the Dynojet kit for drilling out the EPA plug? Read the instructions. A Stage I set-up probably doesn’t want a bigger low-speed jet.
From my experience, don't go overboard. Stay to the lean side initially and open the mixture screw a half a turn or so. That will help with the cold stumble. You may just want to raise the needle a bit by putting a couple of shim washers under where it sits in the diaphragm. Thats what they do with the Riceburners.
Good time to put one of those nice shinny carb tops on it too. And get rid of those cross-recessed screws while you're at it and put some socket head cap screws in there.Top and bottom. Get stainless-steel ones and they won't galvanize in and it will go easier the next time you go in. If you want, you can polish them on a grinder with a rouge wheel and the look better than chrome.
At least you only have one to dowith a Sporty. My other bike has four carbs and then you have to synchronize them.
Get a manual if you don't already have one and enjoy yourself. The"professional" at the shop probably isn't as bright as you are, and doesn't give a sh*t either.
I could be FOS, but isn't the drill bit that comes with the Dynojet kit for drilling out the EPA plug? Read the instructions. A Stage I set-up probably doesn’t want a bigger low-speed jet.
From my experience, don't go overboard. Stay to the lean side initially and open the mixture screw a half a turn or so. That will help with the cold stumble. You may just want to raise the needle a bit by putting a couple of shim washers under where it sits in the diaphragm. Thats what they do with the Riceburners.
Good time to put one of those nice shinny carb tops on it too. And get rid of those cross-recessed screws while you're at it and put some socket head cap screws in there.Top and bottom. Get stainless-steel ones and they won't galvanize in and it will go easier the next time you go in. If you want, you can polish them on a grinder with a rouge wheel and the look better than chrome.
At least you only have one to dowith a Sporty. My other bike has four carbs and then you have to synchronize them.
Get a manual if you don't already have one and enjoy yourself. The"professional" at the shop probably isn't as bright as you are, and doesn't give a sh*t either.
Road Warrior
Joined: Jul 2006
Posts: 1,388
Likes: 2
RE: choosing jet size?
ORIGINAL: kawsakimx6
so i should go 42/180?
ORIGINAL: x2lee
Im saying to stick the 180 size jet in there with your setup.
Im saying to stick the 180 size jet in there with your setup.
Every situation is going to be different depending on where you live (altitude etc).
The one thing that seems to be standard is the bikes are lean from the factory. Put a high-flow AC and mufflers in there you lean it out more. So you need bigger jets to let in more fuel. But how much bigger?
The idle jet controls idle and slight throttle
The main jet controls wide open throttle.
The needle controls the in between
With my bike I put a 45 idle, I used the dynojet needle and shimmed the needle with 2 spacers (maybe 3 I cannot remember) and left the main jet alone. 175 was fine for me. I had it all checked on the dyno. Bike runs great. A 180 jet would have been too rich at WOT for me.
Moral of all this is every bike is different.
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