i have a 02 blaster with some mods dave moore porting and head work full race,toomy pipe ,vito intake 30m makuni round slide 110 32:1 runs great but i cant get no color on the plug almost looks brand new after ten fifteen minutes riding,i have a 340 main 35 pilot 1screw out seems to run great right here all the way thru if i go higher with the main its starts to flutter at full throttle only i have went all the way up to 500 main ran good until 3/4 to full throttle still had no color on the plug. there is no vacumm leaks runs great but afraid to run it lean any ideas thanks[img]i/expressions/face-icon-small-confused.gif[/img] 2nd riches on needle