I just got a new MSR/Zip-ty external fuel mixture screw I understand what it does but any tips on sea level usage or seat of the pants tuning?? When I say sea level I mean sea level I live in central Virginia and rarely if ever ride above 500 feet above sea level and top out around 3500 feet. I ride a '00 YZ 426 with a White Bros tapered headpipe, E-series can, and a P-38 accelerator pump cover. Any tips from a seasoned user would be appreciated. I also would like to thank everyone who responded to my first thread, this site is amazing and I recommend it to everone I ride with.