2005 400ex
Full exhaust
Jetted
AMR super coil and cdi
Uni filter w/modded air box

The bike was running great, I literally went ridding for 2 hours then loaded up the bike and came home. I did not notice anything different with the bike. It sat for three days when I tried to start it, it ran in full choke for a minute with having to give it a little gas then shut off. It would not start again after that. The next day the same deal. Now I won’t start at all, but turns over fine. Any suggestions would be great, doing a compression check tomorrow and then check the timing maybe…..

Thanks Eric