VMC ET7 aluminium cylinder, twin-ring 135cc, Ø 58mm, stroke 51mm for Vespa Primavera - ET3 - PK side spark plug, exhaust booster

Description

VMC ET7 135cc thermal unit, Ø 58mm and stroke 51mm, Side spark plug 7-port aluminium cylinder, shell moulding technology, Nikasil-coated barrel Bore diameter 58mm Stroke 51mm Displacement 135cc, EXHAUST LIGHT WITH BOOSTERS Main transfer ports 128° Exhaust 188°, exhaust stud centre distance 60mm, oval exhaust outlet diameter 32mm Exhaust can be slightly filed down to 36mm to fit our Evo SeiDue and Kifly 62 silencers FORGED piston with 2 Rik steel rings complete with pin and clips. Die-cast aluminium head with SIDE spark plug with 4 additional fixing screws. Squish 1.2mm ± 0.1mm. M7 captive nut tightening torque: 11÷12 Nm, M6 screw tightening torque 10÷11 Nm Complete with bolts and cylinder gaskets in various thicknesses. This cylinder is suitable for extreme tuning. When fitted with a VMC Evo 62, it requires a close-ratio gearbox with more generous expansion silencers such as the VMC Kifly 62 to achieve power in the region of 30hp - Warning: To be mounted on Piaggio crankcases, a small modification is required on the half moon as the cylinder has been designed with generous fluid dynamics that require more space at the base. New model of aluminium head made from CNC machining in Italy, steel segments, steel pins, steel fasteners, squish 1.5 mm ±0.1 mm. Nut tightening 11÷12 Nm, screw tightening 10÷11 Nm, paper/aluminium cylinder gaskets. Road use is prohibited.