02 Canadian WR 426 grumbles and pops when revved..
Posted April 28, 2003 - 03:55 AM
Posted April 28, 2003 - 04:23 AM
Posted April 28, 2003 - 05:04 AM
I have the best results by adjusting the screw while the bike is at at fast idle. Then turn the fuel screw all the way in and back out until the rpms change/increase. I run at that spot where the increase occurs and the bike seems to "free up", which on my 426 at 4000 feet is 1 3/4 to 2 turns out. It runs best at 2 turns out.
I have played with my jetting but am back at stock with the bike uncorked. If I put in the GYT-R insert I am too rich with stock jetting.
If you don't have an extended fuel screw with a "T" on the end, get one. Any brand will work. My bike requires adjustment depending on temperature and humidity which varies greatly this time of year in Wyoming.
You may need more than a fuel screw change, but just a thought on somewhere to start.
What color is the spark plug? I agree with Chris that you sound a little rich.
Posted April 28, 2003 - 06:09 AM
Posted April 28, 2003 - 08:41 AM
The front wheel is almost like the kick stand, it only touches the ground when I'm parked!
Posted April 28, 2003 - 10:24 AM
I would try position #4 on your needle and/or a larger MFJ...Check out my setup.