350x RICH BUT DOSN'T MAKE SENSE

[toyvette81]

i have a stock 85 350x with a dg pipe, stock 138 jet, but the plug is solid black, it looks to rich to even run.. whats the deal, it does not smoke at all
i thought it was very lean b/c it runs pretty hott.
the bike is extremely fast, i have a 142 jet but i dont think ill put it in until i get more air to it
i may need to run a hotter plug?

[Dammit!]

Did you do a proper plug chop?

[toyvette81]

what do you mean by that?

[jmack3986]

hey on the lows you have a pilot that controls you your idle through mid. it can mess with you when you go to jet i would go bigger maybe one to two sizes

[OldSchoolin86]

What did you gap your plug at?

[toyvette81]

bigger on the jet correct?
what should the plug gap be?

[Dammit!]

what do you mean by that?

Only way to check your main jet is to hold the thing wide open for a few seconds, pull in the clutch and kill the motor in one motion and coast to a stop. Then check the plug.

[bigredhead]

Just removing the plug and looking at it is not a good way to tell how it's running.

You have to run it all out in gear and cut the motor with the clutch held in.. then pull the plug.

There are detailed instructions on how to do this .. do a quick search.. lots of info.

[toyvette81]

i just ran it all out in gear and then cut the motor with the lutch in and then pulled the plug, it was nowhere near as rich looking as it was but it is still a rich plug..... i ride it around got it at operating temp wount it out in 3rd and cut the engine with clutch in.

[bigredhead]

Was it a used plug.. or a new one ?

supposed to do it with a new one.

[toyvette81]

brand new.. i am going out there now to install the 142 jet.... should i leave the needle where its at or drop it a notch?, where should it be stock,( mabye its already been messed with?, and could be causing it to be rich with stock jet? so where should it be stock and where should i put the needle with the 142 and dg

[OldSchoolin86]

brand new..
So this is the second brand new plug you put in this morning?

[toyvette81]

yes i have alot of them, where should the needle be stock and where should i set it at.

[BIGCRIP28]

yeah if you idle around alot or go pretty slow you are going to have a black plug.

the needle clip should be in the middle position from the factory.

[jenndnn3]

So that I have this straight, You are running rich? So you are now going to install a larger jet? WHY.

What makes you believe that something is wrong with the jetting to begin with other then the excessive black? I just read the other post, and you say your running very strong, beating others, so why do you want to change a good thing? Is there something else going on that we may need to be aware of to help as to why you want to change the jetting?

Lets start with some basics, exactly what plug are you running?
Your airfilter and box how is it set up?
Where is all of the jetting set at? Ie needle, pilot(SLOW), and main.
You said Dg exhaust, does it have the supertrapp endcap on it with the little plates?
You mentioned you run hot? What exactly do you mean by this, is it just a hot machine, or is because its 101 outside and your racing? Or Is your exhaust going a nice orange glowing color, or is it just after riding some the engine is hot and if you touch the head it can slightly burn you?

I see alot of this, and I do it myself, overanalyzing. Sometimes, there is not a dang thing wrong with the machine other then the person playing with it. Yes I do it myself, but hey....

[toyvette81]

i think its great, every1 on here does not think that i can have a 138 stock jet and a dg pipe and the machine run well.... it is running lean but yes it has a rich plug no matter how you check it?, it runs very hott, not just a slight burn on the head, when i am wide open down the road i have to hold my right leg a foot away from the engine through jeans and knee high boots. it does not smoke at all, i know it is running lean and thats why its hott, it only takes me 10 min to change this jet out if its too rich then ill put the 138 back
the main reason is to cool it off
i dont think anything is wrong with my machine except it running hott, it is amazingly fast the way it is, but it does need to be cooler

[toyvette81]

well i put the 142 jet in, the plug looks the same as with the 138 after riding around and doing a correct plug check. i dont know if its possible to feel the difference from a 138 to a 142 but i think i can.... before it would come up in 3rd about 4 inches..... it came way up in 3rd and had to let off to bring it down after installing the 142 jet.. i have not messed with the needle on the slide on the top, most people have told me to drop it a notch, what will dropping the needle do for the bike?
and im sure i solved the heat problem, i actually rode it with shorts a min ago down the road and was not that uncomfortable it definently runs alot cooler...

[oddball3]

Dropping the needle will lean it. I would put the 138 back in and lower the clip, which will raise the needle. It will make it that little bit richer but not to much.

[OldSchoolin86]

Dropping the needle will lean it. I would put the 138 back in and lower the clip, which will raise the needle. It will make it that little bit richer but not to much.
http://www.3wheeler.org/vb/images/smilies/doh.gifWhy would he put the 138 back in if it's running better and cooler?

Leave the 142 in. When you nail the throttle to take off does it hesitate or does it go pretty smooth? The needle it responcible for the midrange part of your carburation. From what your talking about with your plug chops it sounds like your mid might be rich (honestly a guess). What position is the clip in now on the needle?

[toyvette81]

i have not taken the top off to see the position of the needle since i bought it and i did not look then. i will check that tomorrow when i have some more time... where should it be set at with the 142?
and does any1 know where i can order or get a 14 tooth front sprocket?

[Old 179]

Rocky Mountain Part# 336-14(Primary Drive) $7 plus shipping 1-800-336-5437

[NOS_350X]

I had the same thing happen with me, DG pipe stock jetting. After i changed the jetting its became a whole diffrent bike. If i where you i would play with your needle (richen it up) to make it run even better. Get as much gas in there as you can with out loosing performance. (if it becomes rich you will loose some power) If i where you I would go buy a 145 main try that, the adjust your needle acordingly.

[toyvette81]

yes i plan on going up until it cannot use any more then probbly 1 step down from that

[BIGCRIP28]

im runnin 145 main with dg krome and k&n and mine rips. does not stumble when you slam it open. i am right around sea level, within 20 feet probably.