New VMC STELVIO 2.0 Ø 63mm 177/187cc thermal group for 57 and 60mm stroke for Vespa largeframe 125/150 crankcase
Enticingly produced in Italy, this VMC kit is the result of a constant commitment to research into cutting-edge technical solutions and top-quality materials to meet the needs of the most demanding Vespa riders

Aluminum cylinder and barrel with Nikasil coating by Gilardoni

Bore diameter 63mm, 7 transfer ports, fits both 57mm and 60mm strokes with the supplied shims

Phases: intake ~118°, exhaust ~176°

Meteor piston in aluminum alloy with double ring and biconical pin

Aluminum head with specific fin shape for better cooling, with recessed squish band and 8 fixing points

Side spark plug with central position of the electrode in the combustion chamber, for better combustion

Complete paper cylinder gasket kit with various thicknesses for the cylinder head and base to be able to mount the cylinder in both 57 and 60mm stroke and to be able to choose the best timing for your engine

Galvanized 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 shape optimizes the torque curve, ensuring smooth and powerful acceleration for an exhilarating driving experience.
To preserve this high level performance, it is STRONGLY NOT RECOMMENDED to modify the shape of the exhaust.

We recommend combining the cylinder kit with a good quality advanced crankshaft and a carburetor with a minimum diameter of 24mm in order to have adequate performance