VMC 177/187cc cylinder, Stelvio 2.0 model, 57/60mm stroke and 63mm diameter, two-ring, side spark plug for PX 125/150

Description

New VMC STELVIO 2.0 thermal unit Ø 63mm 177/187cc for 57 and 60mm stroke for Vespa largeframe 125/150 crankcase Entirely manufactured in Italy, this VMC kit is the result of constant commitment to finding cutting-edge technical solutions and top-quality materials to meet the needs of the most demanding Vespa enthusiasts. Aluminium cylinder and barrel with Nikasil coating by Gilardoni. Bore diameter 63mm, 7 transfer ports, fits both 57mm and 60mm stroke with the shims supplied. Phases: intake ~118°, exhaust ~176° Meteor aluminium alloy piston with double skirt and double cone pin Aluminium head with specially shaped fins for better cooling, with recessed squish band and 8 fixing points Side spark plug with centrally positioned electrode in the combustion chamber, for better combustion Complete paper cylinder gasket kit with various shims for the cylinder head and base to allow the cylinder to be mounted in both 57 and 60 mm bore and to choose the best timing for your engine Galvanised steel exhaust manifold screwed to the cylinder with Viton O-ring gasket. The cylinder boasts an innovative exhaust design, the result of extensive research and testing conducted by the VMC team. This particular configuration optimises the torque curve, ensuring smooth and powerful acceleration for an exhilarating riding experience. To maintain this high level of performance, we strongly advise against modifying the shape of the exhaust. We recommend combining the cylinder kit with a good quality advanced crankshaft and a carburettor with a minimum diameter of 24 mm in order to achieve adequate performance.