All the engines with sloping fins are 79 cc Atco Villiers ones made exclusively, in theory, for Atco when in Britain. The ones with flat fins on barrel and vertical fins on the head ( with a tapped hole in the middle usually) are Mk 2 Midgets or Mk 3 with cooling fan and cowling, supplied to many companies for a range of applications. .
Considering the limited air filter they seem to have lasted well.
Last edited by midget98; 22/08/21 02:34 AM.
