I-YS inokubonelela abathengi behlabathi ngeendidi ezingaphezu kwe-150 zee-Bosch valve asembles kwiinjini ezahlukeneyo zeenqwelo zedizili ukuba zikhethe. Iseti yevalve yesitofu yinxalenye ebalulekileyo yokulawula inaliti yesitofu okanye hayi. Indibano yevalvu yesitofu se-YS inesantya sokuphendula esikhawulezayo xa ulawula inaliti yamafutha kunye nokubuya kwepetroli, kunye nolawulo oluchanekileyo lomthamo we-injection ye-fuel kunye nexesha lokutofa kwepetroli, okuphucula ubomi besitofu samafutha kunye nokunciphisa iindleko zomsebenzisi.