400ex smoking

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Mar 29, 2007 | 11:10 AM

#11

dabrowat

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400ex smoking

But can u tell me whats causing it to smoke that much and take the oil??

Mar 29, 2007 | 06:30 PM

#12

cluby

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400ex smoking

You ran a bunch of dirt through the motor and worn out the rings on the piston, that's why it smokes.

Mar 29, 2007 | 07:08 PM

#13

dabrowat

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400ex smoking

Aha thanks. So the worn rings will also cause oil to be taken? I'll probably have to replace the rings. Is it a hard thing to do? Im only 16. THanks

Mar 30, 2007 | 08:18 AM

#14

cluby

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400ex smoking

Kinda, have you ever taken any motors apart. What line of work does your parents do that they maybe able to help you

Mar 30, 2007 | 10:01 AM

#15

dabrowat

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400ex smoking

My parents are no mechanics. Maybe ill find one that can help me.

Mar 30, 2007 | 12:58 PM

#16

garyc660R

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400ex smoking

Quote:

Originally posted by: cluby
How many times have you cleaned it? Did you know it says right on their web site that over 10 cleaning and it starts to loose it's filteration ablities. When you rebuild your 400 through that thing in the garbage. Go get a Uni or Twin Air. I am fourwheeler tech for over 10 years and seen countless times where K&N's where the cause of engine failures. Mostly because people don't stay up on the maintince, they look good but are really dirty. The only people that really get the benift of using K&N's are races.

Good advise mostly. The oversize aftermarket foam filter usually offers enough breathing capabilities to keep even a built racing engine from starving for air......so my advise is to keep the K and N's on the pavement 4-wheelers only....where they belong. [img]i/expressions/face-icon-small-happy.gif[/img]

Mar 31, 2007 | 12:28 PM

#17

zettler450r

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400ex smoking

IMO.... You should have a professional replace the rings, if you have never done it before it wont be easy and just reading an instruction manual is not going to be enough ......

FYI knowticed is spell NOTICED

Mar 31, 2007 | 11:22 PM

#18

CGriff

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400ex smoking

I thought that white smoke ment you were running too lean? My 400ex puffed white smoke when I got it and all I had to do is put the main jet up a size.

Apr 1, 2007 | 11:53 AM

#19

dabrowat

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400ex smoking

When u check the spark plug, do you have to take of the plastic to get acces to it?

Apr 1, 2007 | 10:02 PM

#20

CGriff

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400ex smoking

Taking off the pastics will make it easier to get at but not manditory... its a pain in the butt, but you can get at it without removing anything. You will need a special plug wrench which is included in your ex tool kit. If you dont have one you will either have to buy one or grind down an old socket you have so the walls are thin enough to allow full contact with the plug.