Manufacturer Description

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

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

INCLUDES:
Cylinder Liner with Piston and Connecting Rod

REQUIRES:
Heating crankcase to remove original liner

BOX DIMENSIONS: 3.75" W. X 1.13" H. X 3.75" L.
BOX WEIGHT: .10 LBS.