As stated it is a 03 yz250f. Back ground info on the issue that caused the breakdown. I went dirt riding with my buddy that claimed he had a sweet spot to ride. I show up to find they are riding 4x4 farmer john 4 wheelers. We go out it is nothing but over grown weeds with logs under the weeds. It is all wet so no traction, also no way to get any speed to hop the logs. After getting through all this crap we get to the open area. Turns out to be nothing more then a power line strip. Best part is it has 3- 4ft tractor ruts all over it, plus standing water every where. After a colorful conversation with said friend we go to head back, as I was not going to run this place. We start to leave my friend just up and stop for no reason as I am skipping across the ruts and mud holes. I am left with no other choice but to go to the side of him so that I don't wreck into the back of him. That bought me a 3 ft rut full of water. Needless to say the bike slide out and the water splashed the filter there by killing the bike. I can't get it to start back up for the life of me. So we have to tow it back to the truck. No way to go the way we came as it was a crooked as a snakes back. That leaves us with going down this power road. To make this shorter. This road ended up being a damn pound. Needless to say the bike was at it's bars in water. Get back load it up go home. Now I know that I can't run this thing with out taking the top half off and cleaning it and the carb down. I do so, as well as clean and lube the whole bike. I get the bike back together and not it will not start. I have kicked it till my foot hurt. The only thing that has happened is two back fires. So I rip the cams back off to make sure that I have the timing right. I think I do. Put it back together and same thing nothing, then after a few kicks with the hot start pulled in back fire. I have read a lot of threads on this site trying to get answers. Sad to say I am not getting the info that best fits my needs. I did take the filter off and shoot some starter fluid in there. Same thing single backfire then nothing not even another backfire. I have been working this thing for a few months. I am at my wits end. I have not done a valve check or adjustment. But that should not keep it from at least starting. Also I have not done a bump start as the damn clutch lever cable holder is busted. I will order ASV after I get it started. I gave you all this info including the story to help get a whole picture. Please help me get this thing up and running. Maybe someone has a start up procedure. I am new to dirt biking but not motorcycles. This is my first carb bike.