Matching piston rings for the 130ccm DR cylinder kit for classic 50-125ccm Vespa scooters like Primavera ET3 or PK.
The use on 50 mm crankcases requires an additional 125 mm crankshaft with 51 mm stroke.
The use on 50 mm crankcases requires an additional 125 mm crankshaft with 51 mm stroke.
