its a real problem, cause I cant get my response right even though I am leaning the LSN once my peak is round 9500 RPM on High end side... I can get to my LSN without shutting motor down, got very long screw driver and made hole in cowl... you ever tune the LSN less than 2.5 out? like lean it more?... once I start leaning the response worsens... so I go back to rich then it bogs in the air...