139QMB 85cc Cylinder Head

139QMB high performance cylinder head for Gy6 50cc 4 stroke engines. This cylinder head is of excellent quality and is a big improvement over the stock 50cc head. Couple it with our high performance 85cc cylinder kit for an even bigger improvement. Performance carburetors, exhaust and rollers weights are also available to add to this setup.

This cylinder head comes fully assembled with valves, springs, seats and retainers.