I have just bought a 98 wr400f, I took it for a ride and it cut out after a minute or so at about 3/4 throttle. Wouldn't restart so I had to push it back:(
I got it going again eventually and rode it again. I opened it up and it cut out again. Had to push it back again. Then tried again and it cut out in the same place. I'm guessing a fuel issue if it cut out in the same place.
The bike is fine when putting around at 1/4 throttle but when I go over 1/4 throttle after 30 seconds it cuts out.
I have tried cleaning the jets and they look fine. The spark plug is a light brown ish colour, I will replace that ASAP. Do you guys have any idea what the problem could be? All your help is greatly appreciated!!
Edited by mxrider98, April 30, 2014 - 11:05 PM.