My riding buddy has an 01 YZ426F that won't run for crap. The funny part is that he rode is last weekend, washed it, and parked it until today. We went to ride today and the bike wouldn't run. Both of us now have sore right feet from working on this thing today. Here's the deal. When we get lucky, it will crank and idle with the choke OFF for about two seconds and die. If you try to turn on the choke or give it any throttle it dies. There was about two times where we got it up over idle in which case it seemed to run ok with the throttle at about 1/4. Then we closed the throttle and it died after about 10 seconds of idling. Then it is a real bear to get started again or even to get it to pop off. A couple of times we checked the plug after beating our feet to death to see if it was wet and it was not so I'm leaning towards lack of fuel, but not really sure since it starts with the choke off and will never start with it on. We took the carb off twice and cleaned it with carb cleaner and blew it out with compressed air with no change. As best I can tell air and carb cleaner were coming out where they should have been so I don't think any passages were blocked. Also, we checked for water in the gas by draining some gas into a clear cup and letting it sit to see if any water droplets formed in the bottom. No water. Tried fiddling with the mixture screw some and that didn't seem to do much either. Like I said, this happened very suddenly, and at the moment I'm not sure what to check next. I have been looking through posts for about an hour now and most seem to point to a dirty carb but after cleaning it two times I'm starting to look for something else. Sorry for being so long winded, but I was just trying to get as much info in here as I could.