best plug

[jake"08"400]

So I am getting ready to do some jetting an chop test on my bike..was wondering what y'all recomend for my finall plug...was goin to use some dpr8z for the chopping but what's the best plug to run after I get my jetting right?

[honda400ex2003]

that is the one that i suggest in ngk. I wouldnt run a 9 unless i was doing a ton of high speed desert racing or something like that. chop away... wait a few days though, i wanna buy some stock first. :D it always seems to go that way. I feel like i should own some of it after i get done cutting a bunch of perfectly good plugs up. lol

steve

[jake"08"400]

Yea I'm hope what we discussed before will get me close so maybe just two are three plugs later I'll be done wasting them lol.
You still think the 150 main an 40 pilot with the f/a screw 2.5 out will be close? On a stock exhaust with my k an n filter an the baffle cut out of the stock exhaust.

[honda400ex2003]

thats what i would run. you probably wouldnt even have to do any chops lol. i didnt even look at the username before i posted. I just noticed you were on and thought about if you were going to give an update as to if you got it done or not. steve

[jake"08"400]

Yea I will as soon as I get em...I guess jets are us don't use ups must be coming by usps are something I ordered them Sunday night.

[jake"08"400]

O I forget to tell ya I am running those lil inch uni air filter box holes bout 6 of them if this changes any thing.

[honda400ex2003]

nah it should be ok. steve

[jake"08"400]

Ok thanks I'll let ya know how it goes as soon as I get it done. Also do you run a fmf pipe by any chance if so would you buy again are get a hmf?

[honda400ex2003]

I like my q4 alot, it is def nice for a quiet exhaust. Im done with the loud stuff thats for sure. Every now and again, i run the t4 still if i wanna do a bit of racing or something. I would def recommend an fmf q4 to anyone. steve

[jake"08"400]

Ok I was still debating on the fmf are hmf but prolly going with the fmf.Thanks steve :)

[honda400ex2003]

it really depends on what you want to do though. the fmf will be a great lower and mid pipe while the hmf is a bit freer flowing and will be a better top end pipe. it is quite a bit louder and imo doesnt really sound that nice. I like the 90 decibels of the q4 and it wont get you dirty looks on trails or tickets from the dnr. :D 3x win lol steve

[jake"08"400]

Yea I like the hmf pipes but I ride around a lot of houses don't want to piss nobody off. Plus fmf been around for a while so I'll probably go that route an get a power bomb later on when I get some money. But one more question I'm kinda new to this jetting stuff so do I have to put a new needle in my carb? Isn't the clip on my stock non-adjustable needle already on the 3rd notch stock? Goin by your old post with your jetting suggestions you didn't change the clip on the needle untill its bored over. So any help on that I would apperciate.

[honda400ex2003]

you are correct, you do not have an adjustable needle in your 08. you dont have to adjust it till you have to anyway. you can actually use the needle from the 04s and such in it by getting one. it is set on the 3rd notch so you should be ok for a while anyway. steve

[jake"08"400]

Ok maybe my jets will be here tomorrow so I can get it on Saturday we are about the same elavation so I'll go buy your jetting guide you have on your post an maybe I will be set when my fmf slip on comes in I'll just put in the 152 are 155 an be done. Thanks again steveo!

[jake"08"400]

Well they sent me a 152 main an a 42 pilot:confused: do you think I could go ahead an put the 42 pilot in are will it be way to big? An order my 150 main an put it in next weekend. Any help id would apperciate we are supposed to ride saturday
Thanks

[honda400ex2003]

you can put both in and just leave the f/a alone instead of taking aout to 2.5 turns. sorry for taking a long time, lol i just got home from school for the week. steve

[jake"08"400]

That's cool. So you don't think the 152 main and 42 pilot will be to rich with just my k&n filter wld it help if I took off my lid if it was a lil rich?

[honda400ex2003]

it should be good with the filter elements in it. With the lid off you would be a bit lean again imo. I think it will just about perfect with the 152 in there. :D give it a shot. steve

[jake"08"400]

Ok man I'll let ya know tomorrow how it goes. Thanks for all your help again

[honda400ex2003]

good luck with it man. steve

[jake"08"400]

Ok I put the 152 main jet in it and the 42 pilot got the gas tank back on an cranked it an it was idols high like I had the idol turned up so I took the the 42 out and put the 38 back in untill the 40 comes I ordered in the mail.......do you think itl be ok like that till then it seems to have more throttle now than it did. O and I figured out why it idoled so high my throttle cable wasn't screwed far enough down in the carb....lol

[honda400ex2003]

lol you could have just turned it down with the idle stuff probably. heres the proper idle drop procedure:



http://s759.photobucket.com/albums/xx239/rocky_mtn_honda/TRX400EX%20Manual%20Pages/?action=view&current=carbadjustment.jpg


this will enable you to run the 42 and be all set. this method as to be done every now and again with major weather changes.

steve

[jake"08"400]

yea I knew how to do idle adjust I just didn't feel like taken it back apart an putting that 42 back in lol but I'll do it tomorrow prolly.....but other than that it runs good. Bout to get some nerf bars before my exhaust tho I think itl benifet me more. But you still not think that's to rich with just my air filter?

[honda400ex2003]

nah i think it is pretty close for the colder weather, a filter, and the holes in it. nerfs will be a nice for sure! good luck with the pilot tomorrow :D I may do the same with a another size bigger for the colder weather. It has been starting pretty bad lately. lol steve

[honda400ex2003]

how did it come out? steve

[jake"08"400]

had to work and i didnt get to :( but i got a 40 pilot now and im thinking maybe it would be better till i get my exhaust are something what ya think are should i put the 42 in cos i shouldnt have to adjust the f/a screw would i if i went with the 42?:confused:

[honda400ex2003]

either one will work fine as long as you tune it to the directions above. it just depends on which one you would like to put in there. steve

[jake"08"400]

I think the 42 will work better in the long run I'm just tired of bending 22 shelld to try an turn the pilot screw.......is there an easy way to do it.

[honda400ex2003]

there is actually a tool that dynojet sells that is made to adjust it. you have to call dj and specifically ask for it though to get it. Sometime i would like to try to make a bunch of them but having time to do it is one thing wanting to do it is another. just like the spacers lol. steve

[jake"08"400]

Yea I understand that. Thout bout taking it out an just cuttin a little slot in it to use a flat head on it.

[honda400ex2003]

that would probably be your best bet lol if you do it let me know how it comes out for you. steve

[jake"08"400]

Will do.

[jake"08"400]

Hey steve I think I figured out what's wrong with my fourwheeler the reason its going dead. Its not my wiring I think its the pilot jet cos it does it worse now than it use to (I still have got the stock pilot jet in it untill Friday) anyways I don't think its getting enough gas on deceleration does this sound possible to you?

[honda400ex2003]

im not sure if i completely follow but but i am assuming that it is going dead meaning it dies. I would say that yes it def needs more gas for sure if it is doing that. steve

[jake"08"400]

Yea I pull the clutch an it cuts off like it would if I turned the key are hit the kill switch. But normally only does it in high rpms.

[honda400ex2003]

i would say thats the problem. does it get better if you put the choke on? or if you take the lid off? i guess that would be an easy test to do. i would put the 42 in and see how it does anyway lol. it will be easier to tune with that for sure. steve

[jake"08"400]

Yea I am goin to do that Friday I rekon an maybe take my choke out. Just thout id let ya know I'm pretty sure that's my problem.

[honda400ex2003]

i would only take the choke out in the summer but that is just my experiences with it. i always ran the 38 without much problem at 3.5 turns out so i liked the choke for the cold. having the pilot good in the summer is easy, when it gets cold, really cold, it would take a pretty big pilot with quite a few pumps to get it fired and running decent to warm up. just my opinion on it though. the choke removal is a nice mod though imo. nice bit of throttle response and top end gain. one of my favorite setups was with the 6 degree key, choke out, stage 1, 10:1 416cc. man that was a fun setup lol it was like my stage 2 3 degree, 450r carb i have now but about 1000-1500 rpms lower than what i am running now. steve

[jake"08"400]

It don't get real cold here an when it does its like the 20s and my butt is not on my fourwheeler lol. But I'm goin to leave it in an crank it a couple of weeks without usin my choke if it does ok then its gone.....:)

[honda400ex2003]

the proper spot to have the pilot is to pump it around 4-5 times and it should stay running with that without the choke. this is where it should be to be ideal imo. more pumps too lean, less too rich. steve

[jake"08"400]

I got the 42 put in and wow no more of the popping on decel. And its much easier to start thout id let you know. Thanks for the help.

[honda400ex2003]

glad to hear you got it all figured out! :D congrats! steve