Forgot to mention that the PO is a really cool guy. I called him and asked if he had any clue what was going on before i tore into it and he was so genuinely concerned that he called back everyday since to see if i had figured it out. He also gave me a flywheel puller and manual for free yesterday so i could do the repair.
450F My new WR!
- Thread starter Mojavekid18
- Start date
Most of the time...
4 Strokes have Fuel Screws
2 Strokes have Air Screws
-BIG DAN
You guy are gonna make me whip out the manual 
This is with the bike warm, right? Try turning the idle CCW a little and blip the throttle a few times and see if that clears it up.
If it is the fuel screw, you don't want to go more than about a 1/4 turn out. More than that i think means you aren't properly adjusted at the pilot jet.
If it is the fuel screw, you don't want to go more than about a 1/4 turn out. More than that i think means you aren't properly adjusted at the pilot jet.
Well i started it and mess with the idle and fuel screw real quick this morning. It stalled and now it won't start again at all so i think it got some dirt down in the pilot jet. Im just gonna pull the jets out and watch the storm tonight i guess. I did solve the oil leak this morning though so that is one positive thing
Well i started it and mess with the idle and fuel screw real quick this morning. It stalled and now it won't start again at all so i think it got some dirt down in the pilot jet. Im just gonna pull the jets out and watch the storm tonight i guess. I did solve the oil leak this morning though so that is one positive thing
bk2 luck.
Oh boy I can't wait to get my very own...
So the jets looked perfectly clean, still sprayed them out and ran a wire through them to make sure. If i kick until im blue in the face i can get it to start and run if i hold the throttle open, as soon as you let it under ~3000 rpms it dies and is impossible to kick again. WTF IS GOING ON?
acelerator pump 
acelerator pump
not doubting it. Just read a thread on another forum with someone haveing the same problems as me and he said a new coil fixed it. Im gonna go see if the manual has a way to test this thing
Oh no...... Phantom soft electrical ghost issue.... We just got rid of that yz250f (04) as we replaced the coil, cleaned the carb tuned it perfect..... sometimes it would run perfect..... sometimes it would run like crap..... we could never trust the bike.
coil tested good. Back to square one. Is it possible to get the timing even 1 tooth off and have it do what it did?
Have you checked the plug for fouling? Avgas contains more lead than any leaded gas that use to be sold and used. Lead can build up on the plug and cause it to foul. Check the plug. Maybe change the plug and change out the gas to non avgas and see what happens before you start spending a lot of time chasing down electrical issues.
Just a thought......
Just a thought......
Damn itwrong thread bro
