Hey All,

My friend has a 400EX, i believe its a year 2000.

It is in serious need of a tune up. It wont idle, and cold starts are nearly impossible. It takes about 20 minutes to get it started..

Is there any websites that walk threw a tune up? IE: Carb settings, etc..

Its completely stock. But its never been tuned up, I am going to check the spark plug because i am sure it is ready to be replaced, but i know the carb is going to need some adjustment.


Any help you can offer would be apperciated.

Thanks,

Chad

 

wow man 5 years without any change well u need a valve adjustment, oil change, spark plugs, clean the carb and tank and some other stuff

 

Yeah, this thing is messed up. Its obvious that not all people take care of their toys as well as myself..

Anyway, It wont even run now. It doesn't even sputter. It seams like its either not getting fuel, or not getting spark.

I took all the plastics off and tried to get the spark plug out, but i tried an assortment of sockets and could not get at the spark plug... Is it a special size, or a custom socket?

Thanks,

-ThaChad

 

You need the stamp steel socket that comes with the quad. I have tried sockets from the tool trucks and can't get it, without the stock socket.

 

That's what i thought. I'll have to order one, since he doesn't have any of the tools that came with it.

-ThaChad

 

What is the Correct GAP for the spark plug?

Thanks.

Chad

 

If anyone is interested, the problem was the Spark Plug.

I installed a new spark plug, and she fired right up, after a small idle adjustment.

-ThaChad