I like the standard 86cc better than the one with the booster port.. The carb seems to spit a lot on that motor. Had to bend the intake some and spread the intake bolts to make it work. have another motor apart awaiting the crank, think I will use the polini 75cc on that. All of these are on general mopeds. The morini are on a negrini and motormorina. The safari has the minarelli reedvalve. Also have a autisia kit on a sachs powered general