210 main in my 400ex

[jeremy_283]

i have a 210 main in my 400ex and my bike is still running lean......... wat do u guys think of this?........ nothins wrong with my carb either......... 1000 ft above sea level and 40 F

[300ex mxracer]

i think i heard somewhere if it gets too rich it will act like it is lean or something? 210 is way to rich i think...

[jeremy_283]

so rich it acts like its lean........ thats false im pretty sure

[blasterandy]

Actually I have heard that if its running to rich ie a 210 which is to rich, it can have some lean characteristics but it will deffinitly be noticably be rich feeling. Have you changed your pilot jet to a 42 if not pick one of them up. And ease up on him, he's only giving you some suggestions.:D

[Wheelie]

Why do you think it's still lean? 210 is a lot of fuel for a 400ex.

Heck I'm running a 175 in my stroker and it runs great.

[jeremy_283]

just WOT and my sparkplug still is whiter than ever after that

[lpmaster]

210 k, or 210 dynojet?......have you checked for exhaust leaks and intake leaks, also what plug are you running in my experience cooler plugs like the dpr9z give different readings than the 8z or even iridium plug i had dpr7eix-9

[jeremy_283]

changing the pilot wont do jack for this situation either....... maybe the needle is interfering with the fuel flow?........ when i put the clip on the fourth slot down tho to make it richer...... it is to rich in the mid range then....

[JOEX]

Forget about the plug for a minute...

How does it 'feel' when you're riding? Does it bog or sputter at a certain throttle position? Does it ping under load? Any other unusual noises or symptoms while riding?

Check for intake leaks leaks like lpmaster mentioned.

[GPracer2500]

Don't go by your plug unless you're SURE you know how to properly read a plug. If you're doing plug readings on fresh plugs (and fresh plugs should be used) you've got to look WAY DOWN inside the plug at the bottom of the insulator to see what you should be looking at. The end of the insulator will still be white even if you're way too rich. The only time it won't be white is if it's a non-new plug and those can't tell you very much. Or at least they can't tell you specific information about jetting a particular carb circuit.

The reason they call it a "plug chop" is because in many cases you've actually got to cut or "chop" the threads away to see the part of the insulator you should be looking at. To avoid having to cut the plug they do make special plug viewing tools that are similar to the thing your doctor uses to look inside your ear.

This plug is just a touch lean. The part we're looking at is the "mixture ring" at the base of the insulator--not the end.

http://www.dragstuff.com/images/plugs/10-29-05pass1-05.jpg

This one is a little rich. You can mostly disregard how far up the mixture ring reaches towards the top of the insulator. That's just affected by how long the plug chop test was. It's the color or hue of the coloring that matters for evaluating a/f mixtures.

http://www.dragstuff.com/techarticles/images/sparkplugs/AR3933-terry-wise-plug2.jpg

Because plug reading is so commonly misunderstood, I don't recommend it for most people. Trying to do it without really knowing what you're doing will leave most folks chasing their tale (and usually jetted WAY too rich).

[jeremy_283]

the bike feels no hardly any if no differnce between a 180 main and a 210 main and 170 main

[250X_project]

How did you come up w/ 404cc?? That's impossible, unless you have an 85.75mm bore....

blasterandy is right you need to ease up on people who are just trying to help you. If you don't need their help, I don't know why you posted....

[1fst400]

there has to be somthing blocking your fule flow if there isnt diffrence between a 175 and 210. cleen your carb out good, not just soak it doun with carb cleen. Take all the jets out. everything apart. get new gaskets. and put it back together with a 175main.

[jeremy_283]

404 dont matter anymore since i have a 416.......... ease up? when he said so rich its acting like its lean i was thinking as in the sparkplug would be completely white if its to rich



Originally posted by 250X_project
How did you come up w/ 404cc?? That's impossible, unless you have an 85.75mm bore....

blasterandy is right you need to ease up on people who are just trying to help you. If you don't need their help, I don't know why you posted....

[CHEVYZ]

Originally posted by Wheelie
Why do you think it's still lean? 210 is a lot of fuel for a 400ex.

Heck I'm running a 175 in my stroker and it runs great. I am running the same in my 440. I noticed a huge difference from the 185 I had in it to the 175 I am currently running. If you are not noticing a difference from a 210 and a 170 than we have a problem possibly more so than just jetting. I would agree with what 1fst400 posted......

[300ex mxracer]

404 dont matter anymore since i have a 416.......... ease up? when he said so rich its acting like its lean i was thinking as in the sparkplug would be completely white if its to rich



no i was talkin about how the quad feels while riding, not the plug. i read this somewhere but dont hold me too it.

[jeremy_283]

Originally posted by 1fst400
there has to be somthing blocking your fule flow if there isnt diffrence between a 175 and 210. cleen your carb out good, not just soak it doun with carb cleen. Take all the jets out. everything apart. get new gaskets. and put it back together with a 175main. the thing blocking the fuel flow was the needle :)