Jetting Done/New Exhaust

[Ian400ex]

Okay first, I would like to thank the people who put in their two cents, it was useful; then there is someone that helped me with my jetting relentlessly, honda400ex2003. Steve helped me sooo much even off the forums with my jetting allowing me to be riding my 400 so early.

Here are the pictures..
http://s129.photobucket.com/albums/p234/NarutoNdGaara/LEXX%20MXE/

http://img690.imageshack.us/img690/1785/1001187f.jpg (http://img690.imageshack.us/i/1001187f.jpg/)

http://img683.imageshack.us/img683/2218/1001190.jpg (http://img683.imageshack.us/i/1001190.jpg/)

http://img683.imageshack.us/img683/9941/1001191d.jpg (http://img683.imageshack.us/i/1001191d.jpg/)

Now I think I have a much better understanding of the carb.

[honda400ex2003]

Looks great, glad to hear you are enjoying the new exhaust! Thanks for the compliment, I enjoyed helping you out! steve

[JOHNDOE83]

What did you wined up with for jetting?

[honda400ex2003]

150, 42 pilot, 2.25 turns out and needle left in the middle since it is not adjustable. steve

[JOHNDOE83]

wow? thats kinda odd? but if it works, it works...is he at a high elevation?

or is that just how it turned out?

[honda400ex2003]

I have never seen anyone on the site run anything over a 152 on a slip on with a filter only. you would have to be right at sea level to run a 152. he is about 1000 ft or so. the needles dont usually need to be moved either and if he had a normal f/a screw that he could get out easy he wouldnt need a 42, he could go out to 3.5 turns out and be good. the 42 works good at the 2.25 though since he doesnt have a D tool for the newer carbs. steve

[JOHNDOE83]

yeah the needles a odd thing, ive never even had to really mess with it, even with the big bore stuff.

I think thats why some now arent really adjustable?...probally not much of a need with basic mods?

I just think its odd that only +2 increase is enough for a pipe and filter. but with the elevation and weather conditions being different, its always possible.

here in florida its so hot and humid most the time, we need a lil extra bump up on the jetting.

id still wanna see a plug chop on it, but if all is well theres really no need.

steve is, and will always be, one of the most helpful and intellectual guys on here, its hard to find guys like him in forums.

[Ian400ex]

Haha

Originally posted by honda400ex2003
since he doesnt have a D tool for the newer carbs. steve
I've looked online and no luck, I think someone is playing games with me

[honda400ex2003]

Ian you should do a couple of chops for us if you ever get a new plug lol. he said it runs good so that is all that matters. lol. steve

[JOHNDOE83]

I actually might have a D tool, it came with some jets i bought a while back... if i find it ill send it to ya! i have no need for it.

[honda400ex2003]

if you have it post a pic of it too or even a couple. steve

[Ian400ex]

Originally posted by JOHNDOE83
I actually might have a D tool, it came with some jets i bought a while back... if i find it ill send it to ya! i have no need for it.
:o sounds great would be soooooooooo helpful

Originally posted by honda400ex2003
Ian you should do a couple of chops for us if you ever get a new plug lol. he said it runs good so that is all that matters. lol. steve
what do you mean? sorry :p vid?

[honda400ex2003]

plug chop,

http://www.atvriders.com/articles/sparkplug.html

found one from another thread

I was looking up a search on "Plug Chopping" And I think this will help you....


plug chopping
the plug chop is an essential step in setting up jetting. not only does it help you get good performance, but more importantly, it helps you make sure yr bike is not running so lean that it will blow up!

1. wind it out! . warm the bike up well (5-10 min) with a new or fairly clean plug, correctly gapped, then wind the bike out in a gear. generally, i like to do this in 3d, but it depends how fast yr bike goes in each gear and where y'r doing this test (trying to run a bike out in 4th is not advisable in, say, a school zone). at least get into 2d.

2. hold it there ... even though you will be nervous, hold it in gear at max rpm for a while... what you are trying to do here is simulate the hardest use the bike will ever conceivably see. if you jet for the most stressful conditions, then yr normal use will be well within safe margins. keep yr hand on the clutch, as you could (doubt it, though) seize if you are jetted too lean to begin with. as always, use yr own judgment!

3. kill it. simultaneously hit the kill switch and pull in the clutch. hitting the kill stops the plug sparking; pulling the clutch stops the clutch from turning the engine over (bringing in more unburnt fuel). thus, you get a perfect picture of what the sparkplug looks like at the moment you hit the kill switch.

4. pull over, pull the plug out you will want to have gloves or a set of pliers, cause the plug will be fking hot!!!

5. read the plug. if the plug is:

black and wet: yr jetting is too rich

chocolate brown: yr jetting is right on! you kick ***!

white and burnt smelling: yr jetting is too lean! upjet now . you might also notice a blistered insulator. this is real bad. you are lucky you haven't hurt yr bike worse!



steve

[JOHNDOE83]

you " have" to cut the threads off to get a proper main jet reading.

this is commonly overlooked when jetting, while doing a plug run!!!!!!

read my thread on plug reading for jetting ....info

without cutting the threads you will only determine needle and pilot position....not the main jet!!!

[honda400ex2003]

I should have added that to that one, i didnt fully read it. lol read johns write up also that does a good job of explaining it all. steve

[JOHNDOE83]

This is where to look for the carbon ring, this plug is jetted horribly wrong, but its the only one I had on hand to chop.

If you look hard enough at the base of the dark area, you will see a slight ring, this is the carbon ring, and determines main jet.

this plug was ran for over a year, then ran on numerous runs with the turbo, so its horribly off on color and jetting, and not pulled after a proper plug run.....a plug pulled after a plug run will look nothing like this, just use it as a guide on how and where to cut the threads off, and if you can slightly see the ring in the pic, thats where it will be on a plug after the plug run.


http://i953.photobucket.com/albums/ae15/johndoe83_2010/Picture0060.jpg

[Ian400ex]

Ohhh