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doublejz
10-22-2011, 05:49 PM
Ok so my 2005 400ex appears to be running a tad rich. I'm not carb expert by any means. It has a 160 jet running half and half of 94 octane and VP racing fuel (leaded) 110 octane. Has K&N drop in and white brother full exhaust. It' been cutting out lately going up hills and got around to pulling the plug today. Any suggestions on the plug or what to do is greatly appreciated.

The pictures of the plug were from riding this summer (maybe 10 hours).

http://www.doublejz.com/images/forums/quad/plug001.jpg

http://www.doublejz.com/images/forums/quad/plug002.jpg

http://www.doublejz.com/images/forums/quad/plug003.jpg
chargerlover
10-22-2011, 08:36 PM
glad u posted this mine looks the same i get about 7 hours out of mine and Idk what all is done to my bike besides exhaust an k&n mite have a cam...im clueless on carbs...Hell i had flames out the tail pipe to lol
doublejz
10-22-2011, 08:45 PM
Well I'm planning on running a DP9EA-9 plug (on colder) then stock but I'm just wondering if my lack of power is due to running rich. I have a 3 day ride coming up and I'm trying to get setup the best I can.... then its 426/rebuild time!!! :-D
CJM
10-22-2011, 09:45 PM
Try a 155 main, thats WAY to rich. See the sticky thread (link in my signature) for some plug reading guides/charts
doublejz
10-22-2011, 10:12 PM
Well according to this in your sticky 160 is good.

http://img121.imageshack.us/img121/2353/newpicture1d.jpg

then again every bike/elevation is different. I already have a 155 laying around so I may just try it and turn some screws some too :-P
CJM
10-22-2011, 10:15 PM
Originally posted by doublejz


then again every bike/elevation is different. I already have a 155 laying around so I may just try it and turn some screws some too :-P

See above lol..

Notice the elevation on the chart-setup for closer to sea level for most people. If your in the mtns or higher elevations you need less gas.
doublejz
10-22-2011, 10:18 PM
Supposedly I'm around 1300 ft here.
CJM
10-22-2011, 10:27 PM
Sometimes jetting is a mystery, believe me. Drop to a 155 and see whats going on.

Also it helps if your using keihin style jets, not dynojets-just incase your using dynos-they dont work to wel in keihin carbs.
doublejz
10-22-2011, 10:43 PM
Yea, I'm not sure on the current jets. The previous owner told me that he had a 160 in there. The 155 I have is this little guy which I believe thats the Keihin logo

http://www.doublejz.com/images/forums/quad/155jet.jpg
CJM
10-22-2011, 11:48 PM
Yep thats a keihin jet. dynojets you can tell, they have an adapter and are small round little things.
honda400ex2003
10-24-2011, 06:37 PM
what do you have done to it? 110 on a machine running a 155 main is pretty hard core unless it is 12:1. that will not help your jetting blues any either. it is harder to burn 110 than it is anything lower than that since it has a higher resistance to ignition and would cause it to run rich as a result of not burning all of the fuel.

whats done to it besides a filter and full exhaust?

steve
doublejz
10-24-2011, 07:33 PM
well i typically just run 94 but i was just trying to play around with plugs and gas. So I bumped to a colder plug and mixed 94 and leaded 110 together. Actually runs the same with a better smell :-P

Its got a k&n and full white brothers pipe, otherwise stock. I know its just throwing money away using 110 but I was just trying to find a sweat spot until I tear into it after the last ride for the year next month.
finsteratv
10-24-2011, 07:38 PM
my 05
full exhaust(big gun)
intake
choke mod
running premium at sealevel up to idk in the mountains
i had it jetted at 160 with a 40 pilot, ran awesome and still does for my bro. then again 110 is richer..
TheAwesomehonda
01-18-2012, 09:31 PM
I have a hmf full system comp series exhaust with largest baffle and k&n with no lid and hot cam stage 2 and i'm running a 190 main and 42 pilot and it runs AWESOME!! but i'm getting a 450r carb so what jets would u'll recommend for that?
Drfat400ex
01-18-2012, 09:39 PM
Myn has a slip-on, filter, and a different lid, it's running a 158 and it looks the same as that I know it's way too rich. Looking into a 156 hopefully that works out for me but I'm so cheap I don't wanna spend $15 haha
CJM
01-19-2012, 08:20 AM
Originally posted by TheAwesomehonda
I have a hmf full system comp series exhaust with largest baffle and k&n with no lid and hot cam stage 2 and i'm running a 190 main and 42 pilot and it runs AWESOME!! but i'm getting a 450r carb so what jets would u'll recommend for that?

and what does the plug look like? I have way more mods than you do and I dont even run a 190. Is the 190 a kehin type jet or a dynojet pos?

Your plug should be light tan/chocolate brown. White is lean and black is too rich.
TheAwesomehonda
01-19-2012, 09:42 AM
Originally posted by CJM
and what does the plug look like? I have way more mods than you do and I dont even run a 190. Is the 190 a kehin type jet or a dynojet pos?

Your plug should be light tan/chocolate brown. White is lean and black is too rich. It is a kehin type jet and my plug is always light tan or even alittle whiter then it should be but thats a 2in ehaust the whole way and if i use a smaller baffle or even put on my lid it wont even run.
CJM
01-19-2012, 10:18 AM
Interesting, where are you located if you dont mind me asking?
TheAwesomehonda
01-19-2012, 11:51 AM
Originally posted by CJM
Interesting, where are you located if you dont mind me asking? Hey man i'm in door county wisconsin to not be very exact.. lol
CJM
01-19-2012, 12:22 PM
Still seems super rich, but hey ya never know.
TheAwesomehonda
01-19-2012, 12:58 PM
Originally posted by CJM
Still seems super rich, but hey ya never know. Yeah but it doesn't mater anymore cuz i have a 450r carb on the way so what jet sizes should i use on that.
CJM
01-19-2012, 01:45 PM
Its usually roughly the same jet sizes, maybe 1-2 richer or leaner than what you had been running on the EX carb.
TheAwesomehonda
01-19-2012, 02:03 PM
Originally posted by CJM
Its usually roughly the same jet sizes, maybe 1-2 richer or leaner than what you had been running on the EX carb. Ok the 450r carb i'm getting has the stock jet sizes in it so i think i'll try it like that but do those carbs use the same type jet as in ex carb.
CJM
01-19-2012, 02:05 PM
Originally posted by TheAwesomehonda
Ok the 450r carb i'm getting has the stock jet sizes in it so i think i'll try it like that but do those carbs use the same type jet as in ex carb.

It wont even be close if you use the jet sizes that are in there for 450r. A 400ex carb, 04-05 450 and even the 06 FCR 450 uses the same kinda main jets.
CJM
01-19-2012, 02:05 PM
Originally posted by TheAwesomehonda
Ok the 450r carb i'm getting has the stock jet sizes in it so i think i'll try it like that but do those carbs use the same type jet as in ex carb.

It wont even be close if you use the jet sizes that are in there for 450r. A 400ex carb, 04-05 450 and even the 06 FCR 450 uses the same kinda main jets.
TheAwesomehonda
01-19-2012, 02:14 PM
Originally posted by CJM
It wont even be close if you use the jet sizes that are in there for 450r. A 400ex carb, 04-05 450 and even the 06 FCR 450 uses the same kinda main jets. Oh well thats good to know then i'll put in a few sizes bigger before i even try it for the first time.
audioworks04
01-19-2012, 06:25 PM
Why would you run a colder plug with a high octane fuel? With out the compression or a timing advance you will see zero gains in performance, could see a default actually. Higher octane fuel resist detonation, there for is harder to burn, more octane does not equal more power, it just allows you to run other items that give you more power.