
Complete thermal group GS 56 (125 cc) for Vespa 50 Special-N-L-R/90/125 Primavera ET3-PK-ETS
Bore diameter 56mm Stroke 51mm Displacement 125.61cc
Timings: Main transfers 124° Exhaust 174°
Aluminum alloy piston with high silicon content dual ring.
Head in aluminum obtained from CN machining
Recommended squish 1.5 mm
Bolt and nut tightening 11÷12 Nm
Attention:
To be mounted on Piaggio crankcases, a small
modification is needed on the half-moon because the cylinder was designed with
generous fluid dynamics that require more space at the base of the
cylinder.
Vespa 125 Primavera VMA1>2T
Vespa 125 Primavera ET3 VMB1T
Vespa 125 ETS
Vespa 125 PK

Complete Pinasco racing piston 135cc diam. 57.5/1 (letter A)
Vespa 125 Primavera VMA1>2T
Vespa 125 Primavera ET3 VMB1T
Vespa 125 ETS
Vespa 125 PK