Pinasco 26028500 EVOTEN BIG BORE Cylinder Kit 75 with 12 mm pin PIAGGIO 50 CIAO SI BRAVO BOXER GOLD color DOUBLE RING

Pinasco 26028500 EVOTEN BIG BORE Thermal Unit Cylinder 75 with 12 mm pin PIAGGIO 50 CIAO SI BRAVO BOXER GOLD color DOUBLE RING The Pinasco "EVOTEN BIG BORE" thermal unit 46mm is a new product dedicated to the world of Piaggio mopeds. Compared to the previous model, it has 2 new recalculated main transfer ports and 4 new piston-port transfer ports, the exhaust has been further enlarged to significantly increase performance and accommodate the 22, 25 and 28mm flanged exhaust manifolds. The Pinasco "EVOTEN BIG BORE" thermal unit is supplied with the new central spark plug head with 5 studs fixed flush and complete with decompression valve which definitively eliminates the problem of vents in the combustion chamber and the consequent drops in performance; the compression ratio is 13:1