fremontguy
LIFETIME SPONSOR
- Jul 1, 2000
- 580
- 0
I have pesky problem with xr4 gasping when I open throttle suddenly. Some times I'm able to smooth it out by tweaking air screw. Over all I think the jetting might still be a little rich, plug is black colored. My thought is to lower pilot jet to #55 from #58. Running: M155, P58, N-2nd notch, snorkle out, xrs only pipe at 4000'. Has anyone else had sucess with this issue?
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'99 XR400R '95 300EXC
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'99 XR400R '95 300EXC