jetting start point

[disonny]

My 82 430 jetting is off. The needle is on the top groove, and the main is a 440. Elevation is 1100 ft. I know I need to go smaller on the main but how much should I go. I have a 410 main but that seems like a lot to drop from the 440. The bike blubbers around 1/4 throttle and I haven't had enough open space to try the top end.

 

[Bigbill]

430 sounds about right.

How is the float level.
Is the needle and seat ok? Not leaking?

What size pilot jet? 35, 40, 45, 50?

Now where's the balance screw at?

 

[disonny]

I don't think the needle and seat are leaking. I didn't pull the pilot but I think it's close. The air screw is out about 1 turn. Float level looks ok

 

[Kartwheel68]

My 430WR is running 45 pilot, 3.0 slide, 440 main, 6DH3 needle, and R-2 needle jet, which is stock except for the slide and needle jet.

 

[fran...k.]

Don't worry about the main jet if you don't have space to use the main jet. After you take out the main jet the needle jet pushes or taps out in the up direction. Have you experimented with the clip? Sounds like you are a lean as you can go on that needle/needle jet combination. R-2 seems to be what I find in the water cooled ones even the auto ones that the spec sheet says they come with R-0. Mine is an 88 and that is where I am top clip/leanest R-2. I got an R-0 but have not experimented. I forgot which way the numbers on the slide go but it is the direction of a bit more cut off. I lowered the compression and the exhaust is different than an 82 so it may not apply too well. Mine runs very well with a load, doesn't need to be much of a load. I am probably usually around 800 feet elevation.

 

[2premo]

3.0 is the slide cut, a higher number pulls less vacuum across the needle jet so leaner

 

[fran...k.]

You can modify them to raise the number? I had a chart at one point. I think you start where the cut starts and raise only the back.

A few other simple things. You are supposed to pack the silencer before jetting.
If the bore the slide moves in has worn bigger or the slide smaller it might be frustrating no matter what at small throttle openings.

 

[2premo]

You can modify them to raise the number? I had a chart at one point. I think you start where the cut starts and raise only the back.

A few other simple things. You are supposed to pack the silencer before jetting.
If the bore the slide moves in has worn bigger or the slide smaller it might be frustrating no matter what at small throttle openings.

you are correct it is a cut in mm and don't alter the cut past where it is now

 

[ruwfo]

I'm a sea level, my 82 430CR has :

2.0 slide
50 pilot
340 main
forget where the needle is , somewhere near the top

running 32/1 fuel too ,which is on the rich side

runs awesome

Husky John

 

[disonny]

Just took the carb apart, it has a 6DH3 needle with the clip in the top notch, a 2.0 slide a 45 pilot and a 440 main.
the air screw is 3/4 of a turn out. Should I go up to a 50 pilot?
Will a smaller main affect mid range or only closer to full throttle?
I'm running 40 to 1 fuel mix
Thanks for the help.

 

[2premo]

Just took the carb apart, it has a 6DH3 needle with the clip in the top notch, a 2.0 slide a 45 pilot and a 440 main.
the air screw is 3/4 of a turn out. Should I go up to a 50 pilot?
Will a smaller main affect mid range or only closer to full throttle?
I'm running 40 to 1 fuel mix
Thanks for the help.

if the idle is good at 3/4 turn out on the fuel screw i would leave it alone, does it idle well?
your first post says your issue was 1/4 throttle, try moving the clip down to the middle and see if it is an improvement
1/4 throttle is just off the pilot circuit and very much controlled by the needle, needle jet and slide cutaway

 

[Bigbill]

This is why I questioned the float level. Blubbery off the bottom. With the needle lowered.

 

[ruwfo]

my air screw is out 1 full turn, pilot controls up to 1/2 throttle, main takes over after that.

The setting i'm using , work awesome at Unadilla where your heading to soon

 

[2premo]

idle circuit including pilot jet and air bleed screw cover idle to 1/4 throttle
throttle valve and needle jet cover 1/8-1/2
needle covers 1/4-3/4
main jet covers 1/2 to full throttle
obviously they blend in and out of each other
see if this picture shows, i am not an expert at this
http://www.yourhusky.com/files/87-ownersman.pdf, page 75, basic carb jetting and function

 

[Kartwheel68]

Just took the carb apart, it has a 6DH3 needle with the clip in the top notch, a 2.0 slide a 45 pilot and a 440 main.
the air screw is 3/4 of a turn out. Should I go up to a 50 pilot?
Will a smaller main affect mid range or only closer to full throttle?
I'm running 40 to 1 fuel mix
Thanks for the help.

The pilot really only effects idle, it has a very small effect above idle, but the slide cutaway and needle jet control above idle to 3/4. You need to see what needle jet you have.