Holy lord WTH.. Yah another jetting ? :sigh:

[Thumpin440ex]

To the guys running big bores, 450r carbs. Are you all using 185-220 Keihin brand jets or another make of them? I am aware that they are different, as far as numbers go.. I have a few lined up, but want to make sure that a 185-190 keihin brand is what I want, not another brand.. Thanks, damn sorry for the dumb *** ??

John

[honda400ex2003]

i would say that is what you want. keihins are what should be ran if you have a stock needle in it. Did you get the carb used by chance? It may have been switched to a dj setup at one time if used. this could be your main issue you are having.:confused: :confused: it is possible i suppose. lol anyway you want to get the keihins only. steve

[Thumpin440ex]

Yes the carb is used. I also received a jet from the same guy. To be honest I never even checked yo see if it has the adapter that comes with the DJ kits.. So just so I am on the right page, a K 185-90 jet is what I want. I see all the guys talking about 200-220 jets, assume it is K jets they are running.. But with out a doubt in my mind, esp after looking at my plug it is rich, so it might be a diff make jet..

John

[honda400ex2003]

they should all be k jets that they are running even that big. i dont think you can get over a 220 but could be mistaken. I know that wheelie had to do some custom jets when he was first doing his e85 stuff. steve

[Thumpin440ex]

Originally posted by honda400ex2003
they should all be k jets that they are running even that big. i dont think you can get over a 220 but could be mistaken. I know that wheelie had to do some custom jets when he was first doing his e85 stuff. steve

Okie sounds good then. I just don't know wtf it is so pig rich with that jet in it. Hell I am about sea level, the head has been worked on it.. Hmmm

John

[killer400ex]

check air/fuel mix, had the same problem on mine

[Thumpin440ex]

So your talking about the screw on the bottom of the carb???

Thanks
John

[Wheelie]

A 230 is the biggest Keihin jet.

FWIW--When I was running gas, I ran a 195 or 200 main with a 48 pilot.

Stick with Keihin jets.

[honda400ex2003]

thanks wheelie, i knew that you knew what the biggest was. 230 it is :D thanks, steve

[killer400ex]

Originally posted by Thumpin440ex
So your talking about the screw on the bottom of the carb???

Thanks
John

yeah, mine was rich so i re-jetted, and after that it was way to lean from going down one size, so i played witht the air fuel mix and that got it spot on, they make air/fuel screws that are easier to adjust by hand, its like a knob instead of a hidden screw, oh and also unscrewing the mounting bracket for the idle adjustment will make it alot easier to access

[Thumpin440ex]

Originally posted by killer400ex
yeah, mine was rich so i re-jetted, and after that it was way to lean from going down one size, so i played witht the air fuel mix and that got it spot on, they make air/fuel screws that are easier to adjust by hand, its like a knob instead of a hidden screw, oh and also unscrewing the mounting bracket for the idle adjustment will make it alot easier to access


You have a link to that A/F screw with the knob?? Thanks


John

[honda400ex2003]

did you get anywhere on it? I think around a 185 would do it. with the needle either on the 3rd or second with a 52 pilot at about 2.5 turns out on the f/a. wheelies suggestion is where i would be hitting thats for sure to give that a shot. steve

[Thumpin440ex]

Na man I havn't even bothered with it. Been super busy.. I might get around to it this weekend. I will keep you posted. Again thanks for the help guys :cheers:


John

[Thumpin440ex]

Ok finally have got around, butting up now. Stuck a 185 HRC jet in, set the AF screw @ 2.5 turns out.. Puttin it back together now. Hope it gets the low-mid hiccup out, the jet is correct. I just noticed to that the inside of the pipe at the tip is sooted up bad, which also led me to think it was really which. some is ok, but this was a good bit.. Fingers crossed..

John

[honda400ex2003]

good luck! steve

[Thumpin440ex]

Well just got back from terrorizing the streets. LMAO The low end hiccup-stumble is gone now when it gets warmed up, almost gone when its cold, I pop the gas( I know not to do this, but just comp as to how bad it was before) The 185 jet feels a touch stronger up top, not a bit of popping on decel with the throttle shut.. Going to throw a new plug in it soon and do a half *** chop.. So far so good. I do think my hinson clutch is slipping thow, it has a lazy feeling shifting into 3rd gear, like its sliding. So might shorten the basket bolts up some, to get more pressure on the springs.. Also thinking about dropping a tooth off the front sprocket( has 2 off the rear already) might want a lil more mid range punch back, as the gears feel a lil long... :D But as far as the jetting it seems much closer then it was, thats for sure.. What is the stock clip set at on these carbs?? And I am sure this has the stock needle in it... Thanks again for all the great advice and info. And don't mind my F^&Kn novel I just wrote you all hahhaa


John

[honda400ex2003]

I think it is the 3rd notch but it may be worth while to do a bit of experimenting just to see. you may want to go to the second and see if it helps out the mid at all. you could also try to go in a bit more on your f/a screw until you get the slightest pop on decel. this could also do it enough to help all over. glad to hear it is getting closer for you though, steve

[Thumpin440ex]

You read my mind, I do think I am going to take it in to maybe 2 1/4 poss 2 turns out on the AF screw. I need that link to the knob that goes in the place of the AF screw, cuz it is a PITA to get to.. As far as the needle I might play with it, but not sure yet. It still starts easy. Easier then any quad I have seen, so this leads me to believe that it is still fat. I would like to have and bump the throttle to get it to start, seems that is where all the quads I have rode in the past have been like.. Or just the fact that the carb off the 450 is that much more efficient...


John

[Thumpin440ex]

Ok so road the bike pretty hard this weekend. Other then getting hot as hell, it ran perfect.. I set the AF screw at about 2 1/4 turs out, main jet is 185, the thing runs really well. Still think it can use a needle adjustment, for a fine fine tune, but it is just about on... Here is what the plug looked like after a hard 4th gear pull and shut off... It is getting really close...

http://i6.photobucket.com/albums/y216/mangler0075/400ex/plug.jpg

I ran my buddies pipped,jetted,air cleaned, 08 trx 450 R from a 2nd gear roll, he jumped out by about a half on me, then once the dinosaur and cam came alive, I reeled it back, was on the way by him, but ran out of room, really never got to stretch the legs out.. That was about low mid 3rd.. From a dig it was a wheelie battle, back and forth.. I still think I am going to drop one of the front sprocket to get a lil more mid pep from it...

John

[honda400ex2003]

looks pretty good to me. Id leave it but it may be worth messing with the needle just for fun anyway. lol drop it down to the second and see how it does. that will lean it out a bit for you. steve

[Thumpin440ex]

Do you have a link to the AF screw with the knob on it, so it makes things easier to adjust??


John

[honda400ex2003]

http://www.tmdesignworks.com/index.php?main_page=product_info&cPath=152&products_id=251


ebay also has a bunch too. some of them are pretty cool and are cheaper on ebay than that place. steve

[Thumpin440ex]

Originally posted by honda400ex2003
http://www.tmdesignworks.com/index.php?main_page=product_info&cPath=152&products_id=251


ebay also has a bunch too. some of them are pretty cool and are cheaper on ebay than that place. steve

Thanks brotha.. But will the FCR screw work on the 04-05 honda carbs.. That is all I see listed...

Thanks John

[honda400ex2003]

im not really sure. lol i guess i just saw crf 450 carb and other yamaha carbs and figured it would work i forgot to look to see which you had. lol ill find a new one. steve

[honda400ex2003]

it seems that they have them labeled as the same on ebay lol steve

[Thumpin440ex]

Yes I see this. I just picked up a tusk one for 17 buks.. Will make life a lil easier.. Thanks for the help man, and the link


John

[honda400ex2003]

which one did you get by tusk? steve

[Thumpin440ex]

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=140467637712

[honda400ex2003]

cool! i may have to pick one of those up also. steve

[Thumpin440ex]

I will let you know if it is in fact the right one.. Seems to me they all use the same type...


John

[honda400ex2003]

sounds cool! Thanks, steve

[Thumpin440ex]

Hey Steve?? Do not order that needle, unless it states it will work with the trx 04-05 450.. I picked on up, it doesn't not fit :(

John

[honda400ex2003]

Bummer... thanks for the info. steve