trouble tuning 01 yz426

Joined
Sep 20, 2001
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#1
Anyone else having trouble getting their 01 yz426 dialed in? I've been at it for a couple of months now. I have done the following:
adjusted for high altitude w/150 main jet, stock pilot, jet needle clip at fourth pos from top, and replaced accelerator pump w a 7mm stroke (from 8mm stock). The initial symptoms:
after warm up, bike running rough at 1/2 - 3/4 throttle.

Anyone else having similar probs???

Thanx...