Cylinder kit 145cc 60mm Pinasco Zuera VTR Big Bore reed valve Vespa V50, PV, PK
recommendd plug: B9ES
port timings: 125/185° at 1.0mm squish
exhaust width: 66%
Hole to hole distance exhaust: 62mm
Casing does need to be machined 1mm to seal the big transfers.