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Rear - VNA
Fits 50cc 139QMB and Minarelli/Morini 2T drum brake rear wheels
When mounting onto a classic Vespa or Lambretta split-rim
Pad dimensions: 61
NCY 139QMB Performance Cylinder Head 81cc 50mm CVT (automatic) Rear - VNAThe NCY 81cc Aluminum Performance Cylinder Head is a direct upgrade for 50cc 139QMB based engines. Pair it with NCY's 81cc Cylinder Kit to push past stock displacement and gain the power needed for city traffic and hills. Made in Taiwan. ISO 9001 certified. NCY has been the aftermarket performance leader for popular scooter platforms since 1997. Key Features 81cc alloy performance cylinder head for 139QMB GY6 50cc engines 50mm stud spacing direct fit
