2003 WR450 stutter???
Posted July 24, 2009 - 06:13 PM
What set up are you guys running in the carb?
I am at 1500' with a silent insert put back into the gutted exhaust and still using the stock spark arrestor screen. The bike will start with no choke and doesn't feel like it needs much warm up time. If I try to hold a steady RPM in nuetral the bike does sputter a bit. Wack the throttle and it hits hard and fast.
Posted July 24, 2009 - 06:16 PM
Read the stickies and FAQ.
Posted August 01, 2009 - 09:57 PM
Posted August 02, 2009 - 12:00 AM
i have an 04'wr450 i just rebuilt the engine top and bottom end it has a stutter or missfire at 1/4 to 1/2 throttle to the point it is almost impossible to ride ordered a jd jet kit (not here yet) i have read all the posts i can find on this issue anybody had coil issues ,i have an 02' yz 426 and i know it has a slight stutter at steady cruise but nothing like this wr this one has me stumped
FROM THE FAQ STICKIE:
Q: Why does my WR seem to miss when I hold the throttle steady in the 1/4 to 1/2 turn range?
A: That's your TPS (Throttle Position Sensor
) doing it's job. Dirt bikes don't normally run with a steady throttle off road and they weren't designed too. Unplug it and see if the "miss" goes away. If so, then you know. You can also follow the procedure for checking the TPS voltage in the manual. It's extremely simple if you have a multimeter and some folks have found that it is set funky from the factory. Once properly adjusted, the problem goes away.
Well, not always. You can unplug it too.
Posted August 02, 2009 - 05:11 AM
Posted August 02, 2009 - 09:31 AM
Posted August 02, 2009 - 01:31 PM
Posted August 02, 2009 - 07:45 PM