Hi zordmaker
I´ll try explain LPG
LPG 1 valve : open/cut LPG coming from Tank to Vaporiser
LPG 2 valve : open/cut Gasoline to Carby ( both valves can be manually operated )
A : Mixer with Little Holes around - Sits over stock carby & under Air Filter Box rubber .
TAP : to regulate Lpg Amount + or - at High RPM ( there is another little screw on LPG Vaporiser to regulate + or - at Ralenti )
* The LESS LPG on Carby - The MORE POWER ENGINE GETS * ( the opposite of gasoline )