For sale is New Old Stock Genuine McCulloch Piston.  New old stock with the original dust from 50 years of sitting in the shop.  P/N 47766.  Oversize bore +.010".    Bare Piston - No Rings. 

This is Genuine McCulloch new old stock produced 50 years ago.

This Fits McCulloch Karts:
Mc 40 & Mc 90