thanks for help
but, the AFR behind the air filter wan, can be tune, and mati engine tim, so i return back higher abit therefore the engine wont die, but then, the other screw using finger to tune wan, unable to be tune...i can hear any different to the engine sound when i turn clockwise or anticlockwise,So this screw is for `air'?? and the screw using special allen key is AFR? if that so,i can tune the AFR, but `air' cannot be tune, heard that micro compressor technology is used to control the amount of air right? so, will it help? if i tune the AFR to optimum level, and tune the DIY micro compressor for air intake....?thanks