It does not have a power valve, just the plug. The air bleeds are have been drilled but are not replaceable, was told with alcohol jets it has been modified to run methanol but rules allow pump gas only. I switched the jets to 92 in pri. and94 in sec and did help it at over 5000 RPM but its still acts crazy from 2500 to 4500 while you are going through the range to get to 7500 to start leaving with the sled. when it got to 5000 it smoothed out alot better.. so i think where on the right track.. It acts like it could even stand a little more fuel its not bogging or smoking, and throttle response is really good. Thank you all so much for helping me it is nice to see some improvment. I welcome any and all suggestions..