PLEASE HELP(jetting issues) Jd jet prb

[ktm_cody_199]

I just put my jd jet kit in my 2007 250sx-f and it sucks.The recommended jetting and fuel screw setting boggs BAD!!!It has more power and idles well but if I crack the throttle it wont really even bog it will just die.PLEASE HELP!!!I want to die

I am at sea level with #185 main,red needle with clip in #4 position.HELP!


EDIT: Just tried needle in 5th position and didnt do anything.

EDIT: moved the clip up 1,didnt work,then down on from the previous position and got a little better.
Some one has got to know how to fix these problems!!

[AJ_YFZ]

kinda sounds like yer too rich...

[Freak]

I'd go down on that main jet. Maybe two sizes down. Keep an eye on your plug color so you don't lean it out.

[ktm_cody_199]

How would I solve that,I have never jetted a carb in my life and I think I am starting to understand it from some research on google.I put the clip in the verry last position on the needle and bog is almost gone?What does that mean?Tommorow I am going to put the stock needle in and play with that some.I also adjusted the acp timing screw and that helped some as well, My fuel screw is 2 1/5 turns out from stop and I have #60 leak jet if that helps.Maybe a diff Main or Pilot?I am ganna research it some more.Starting problem is gone and has lots of midrange and top end,What jet controls the low end snap?

[ktm_cody_199]

Originally Posted by Freak

I'd go down on that main jet. Maybe two sizes down. Keep an eye on your plug color so you don't lean it out.

What will that do?It had a #175 in it Stock.

[Freak]

the more you go down the clip on the needle, the more it leans it out. If your bike is starting fine and idles fine, I would not mess with the pilot. The main jet runs about 1/4 throttle and on up. So if the bike is running fine with 1/4 or less, your pilot is ok.

[ktm_cody_199]

Originally Posted by Freak

the more you go down the clip on the needle, the more it leans it out. If your bike is starting fine and idles fine, I would not mess with the pilot. The main jet runs about 1/4 throttle and on up. So if the bike is running fine with 1/4 or less, your pilot is ok.

OK,so jd reccomending a #185 main may have been to rich.and say a 180 may be right?Or a stock 175 with the clip in a diff position?

[Freak]

Originally Posted by ktm_cody_199

What will that do?It had a #175 in it Stock.

Try a 172 main and move the clip back up a notch or two. Please keep an eye on plug color. Check this link for some good plug color pics. I think way to many smoker guys neglect plug color. [Only registered and activated users can see links. ]

[Freak]

If you got the 175, try it.

[Freak]

Ok, your running a 185 now. Go one or two sizes down from that. It's best to go one size down at a time. Too big of a jump and you could lean the bike out and blow your engine. Just keep a close eye and that plug color.

[ktm_cody_199]

Originally Posted by Freak

Try a 172 main and move the clip back up a notch or two. Please keep an eye on plug color. Check this link for some good plug color pics. I think way to many smoker guys neglect plug color. [Only registered and activated users can see links. ]

That guide REALLY helps because I also have a 04 125sx (retired) that after looking over the guide is running lean (plug 28 looks just like it) Havent looked at my sxf plug But now I will Thanks!!

[ktm_cody_199]

Originally Posted by Freak

If you got the 175, try it.

I am ganna try the 180,then the 175 and see wich is best.Where should I put the clip at and wich needle Should I use with either jets? or should I do the trial and error like I have been

[Freak]

No problem bro. Some jetting gurus may step in here later and give better advice. Best way to tell plug color is a WOT chop.

[ktm_cody_199]

Originally Posted by Freak

No problem bro. Some jetting gurus may step in here later and give better advice. Best way to tell plug color is a WOT chop.

You have no Idea how much this helps,I was playing with my needle when I should have gone down on the main.Why would JD reccomend such a rich main?

[Freak]

Originally Posted by ktm_cody_199

trial and error like I have been

yup, it's a crap shoot bud. Pull that plug now and take a look, should give you a really good idea where your jetting is right now.

[ktm_cody_199]

Originally Posted by Freak

yup, it's a crap shoot bud. Pull that plug now and take a look, should give you a really good idea where your jetting is right now.

Usually I just pull the plug every few rides and do the......Wooooow Junk, and throw it away

[Freak]

Originally Posted by ktm_cody_199

Why would JD reccomend such a rich main?

It's just a general place to start. Sometimes there right on, sometimes there way off.

[ktm_cody_199]

O and can anyone tell me how to swich my avitar from begginer class?I am a B rider.

[ktm_cody_199]

Originally Posted by tirebiter

The lower you place the clip on the needle, the richer it gets.
Most bog problems are pilot/fuel screw/AC pump related, not necessarily main jet.

tanks tirebiter,I believe I have a 45 pilot and I am going to put the 180 main in right now with the clip in the middle position on the red needle and try that.If that dont work I will try the blue needle then the stock needle if all else fails, I have the red JD fuel screw.

[ktm_cody_199]

Just put the #180 main in it and it does NOT die any more but there is still a bog but not nearly as bad.I also played with the fuel screw and it also helped some.I am going to lower the clip some and see how it is then raise it and if that dont work I will change the needle.Thank you for the help tire biter,the bog is going away!!

BTW,this bike never had real good jetting before and I learned to ride it from mid to top with out utilizing bottom end power.Now with the jetting coaxing out the low end,This bike rips all the way from bottom to top and accelerates FAST!!