Buzzetti alternator rotor puller with M27x1.o left-handed thread. Required for working on the alternator and underlying parts as well as changing crankshafts and bearings. The puller is screwed into the rotor and pulls using a tension screw. Rotors that don`t come unstuck can be eased along with light hammer blows to the tension screw. Warning: suitable for Minarelli engines with Yamaha ignition systems. Also suitable for CPI, Keeway and Chinese Minarelli derived 2-stroke engines. These use M18x1.0 or M27x1.0 left-handed threads according to the manufacturer. Please check the thread specification on the model beforehand.