2002 Honda 400ex - Won't Start

[terry001]

Hello fellow riders. new to this. I have a 2002 Honda 400ex. Just picked up. It will not start. Owner said it was running a few days ago.(LOL). Quad was all together when picked up. spits and sputters and back fires.

This is what I have done.

#1-checked fuel--OK-Spayed starting fluid--no start

#2-check spark--OK

#3-check compression-100-110psi

#4-Pulled valve cover off and check timing. Timing good. top dead and cam at two lines even with head.

#5-doubled checked timing again-OK

#6-6 of 8 bolts holding valve cover stripped.Don't know if this affects anything.

#7-decompression seems to be working-only rotates one direction. Manual dosen't seem to say much on it works.

Any advise would greatly help

Thanks

Eger rider

[oxidized_black]

i would take the carb off and give it a really good cleaning, check the needle and seat at the float and make sure needle has a nice point ... i would remove as much as i could with the inards and clean thoroughly using a stripped twist tie to get everything cleared out ... lots of spray carb clean and if you have a compressor to blow it all out, all the better ...

[terry001]

i would take the carb off and give it a really good cleaning, check the needle and seat at the float and make sure needle has a nice point ... i would remove as much as i could with the inards and clean thoroughly using a stripped twist tie to get everything cleared out ... lots of spray carb clean and if you have a compressor to blow it all out, all the better ...

Thanks for the response

I cleaned the carb pretty good. I forgot to mention that I pulled the quad behind the truck and still no start. I'm a pretty good tech but damn this thing has got me stuck.

[marioweldinginc]

Did you adjust the valves? If they arent within spec you wont start.