i just changed my oil in my 2005 honda 400ex yesterday and today i was riding it hard and it started smoking. what is wrong?

 

valve seals I believe common problem on 400ex.

 

did u change brand, weight, or amount of oil? its still probly valve seals

 

not to be an A$$, but did you overfill it??

 

i think they dont hold a full 2 qts , something like 1.9 qts , so overfillin can easily b done

 

With oil change engine hold's 1.6 liters (1.7 Quarts)...

 

my 07 owners manual says 1.8 qts

 

My '99 owners manual says 2.3 quarts. Which I found is way too much...
While checking the oil level during the ride this past weekend, it overflowed out of the dipstick hole and all over the oil tank. The 400ex is an excellent machine, but one of the only frustrating things I've found so far is getting a consistent reading when checking the oil level, especially after an oil and filter change.

 

the honda shop told me bout the 1.9(but if uns have the owener manual it prob is better to go by that, but why r they not saying the same & wonder why they told me 1.9)

 

<div class="FTQUOTE"><begin quote>Originally posted by: crazy old mudslinger

... & wonder why they told me 1.9)</end quote></div>

Because they don't know what the h3LL they are doing half the time. I went down one day to ask on a wheeler I was working on for a buddy. He said, "Uh, I got one I put 2 quarts in lets check" he gauged and was like "That looks about right".

Best to undershoot slightly, gauge, and add than to overfill.