SSP UA Racing Cylinder MALOSSI MHR 136cc: for Vespa 90125, PV, ET3, PK, S, XL, 2 Ø 57, 5mm, aluminium, 6 ports, stroke 51mm, pin 15mm, with cylinder head, M6 exhaust studs, direct or crankcase intake MALOSSI small frame tuning the next generation Close on the heels of the 136cc MK II cylinders release the Italians follow it up with the MALOSSI H