Im in possession of a Rossi Black Pixie .12 motor. Something i havent heard of in years. And nothing i know the specs of. Im helping out a friend who bought this motor used. I tore down the engine to find 3 ports intake and 1 exhaust. Head shims totalling 0.3mm. What shim clearance do we need to run 20 percent fuel? What glowplugs can work with this engine? Can a os#8 work? It came with an Odonnell 77 standard plug. Anyone know the oem needle settings? Any help would be appreciated.