VESPA - POLINI POWER EXPLOSION 294 cc Racing CylinderFor Vespa GTS GTS Super GTS Super Sport GTV 300 ccm 4T LC also suitable for Quasar 300cc 4T LC i. e. Aluminium 77mm stroke 63mm piston bolt 16mm without cylinder head without ECU Electronic Control Unit TUNING SPORT powerful For racing purposes only. Not permitted under the German StVZO! POLINI gives the Vespa GTS 300 engine a real 293 cc and offers pure power. The POLINI EXPLOSION racing cylinder for the Vespa GTS 300 models reaches a displacement of