The Pinasco 102cc SRV "Zuerino BOOSTER" Ø 55mm cylinder kit is a new product dedicated to the world of Vespa 50 and Ape 50 in 43mm stroke. Born on the basis of the famous 135cc Zuera, the 102cc SRV "Zuerino" has a transfer system very similar to that of its older brother, uses the same RD350 type reed valve and the same flow guide, mounts a single-ring piston with bi-conical pin, the new head with central spark plug with 8 studs with centering bushings which definitively eliminates the problem of drawing and consequent loss of performance with a compression ratio of 12.3: 1.

The Pinasco 102cc SRV is a copious engine created to make the most of the power at low revs, its exhaust port has been designed to work correctly with original exhausts and molded mufflers commonly called "bananas" but can also be used in more demanding preparations .