OS Motors Cylinder Assembly Rebuild Kit 21XZ-R VII

This is the Cylinder Rebuild Set for the
O.S. 21XZ-R Variation II ABC Engine.

FEATURES:
Brings back proper performance to engines with used liner and piston fit
ABC piston and liner building and construction "A"luminum piston fitted to a
    "B"rass cylinder liner that is "C"hrome plated
Liner has 7 scavenger ports and three exhaust ports for more
    efficient combustion

CONSISTS OF:
Cylinder Liner with Piston and Connecting Rod

NEEDS:
Heating crankcase to eliminate initial liner