PARMAKIT 135 CC W-Force Vespa PK/Special/ET3/Primavera 50 & 125 cc

-7 Transfers !

-FITS THE 51 mm STROKE ENGINE (97 mm con rod)

-58 mm bore  /51 mm stroke /  135 cc

-Intake rubber 37 mm

-Anodised aluminium cylinder head with side sparkplug hole

-Intake reed block with 8 valves and flow guide

-Forged Vertex one ring piston

-It’s possible you have to modify the carter and the frame for engins less than 125 cc (PK50,Special50, N etc)

-Needs a 51 mm stroke (97 mm) con rod as in 50 cc there is a 43 mm fitted !