03 WR Won't run
Posted July 16, 2007 - 06:15 PM
Posted July 16, 2007 - 08:08 PM
Have you checked to see if the woodruff key on the flywheel has been gone thru? Many of the '03's had issues with the machining on the flywheel and would shear the woodruff key! Do a search to find out all the info. unique to this year model.
Went out rideing this weekend and got a few miles into the woods when my bike started backfireing a missing. No big deal, thought it may have just fouled the plug. So we stopped and changed the plug. It looked good but changed in a new one since we had bike apart. Put every thing back together and it fired up and ran fine. then about after an other hour on the trails it started missing and backfiring again put would clean its self out. So we kept going. Now when I would come into a corner I would clutch and let off gass and it would stall like I had hit the kill switch. Let clutch out restart keep going. After I hit a big long stretch of Whoops the thin g just died and never started again.
Posted July 17, 2007 - 02:03 AM
This is my bike setup. I am running 48pilot, 162 main,stock needlein stock position with the fuel screw 1 1/4 to 1 1/2 out. Air box snorkel out. Stock exhaust with GYTR insert. This setup has been great for me with no problems till now.
I didn't get home with the bike till late so I have not cleaned it or taken it apart to see what is up yet. I planned on cleaning the carb, checking valve clearence and doing a lot of checking with multimeter on a lot of the electrical components
Posted July 17, 2007 - 09:30 AM
Especially starting and running just fine when the engine was cold, but as soon as you warmed it up for 3-5 minutes then it would start acting funny. Mine would constantly stall when doing corners, and low rpms.
I troubleshooted my jetting, the ac pump, valves, and an auto-clutch for a year and half before I discovered that it was the coil. If you have a buddy you can swap coils with, any YZ,WR 250 or 450 coil will work as a temporary test to see if that's the issue.
Posted July 19, 2007 - 12:33 AM
Gas floats on top of water.
Will run straight (if not too much water) but in turns and whoops the water will start going into the cylender and the motor stalls or dies. Usually starting again is no problem on a level surface.
There is this 3mm allen screw under the carb that you can release to drain the bowl.
Posted July 19, 2007 - 01:15 PM
Posted July 19, 2007 - 06:35 PM
Posted July 20, 2007 - 10:35 AM
Posted July 20, 2007 - 01:32 PM
Posted July 20, 2007 - 01:40 PM