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Cylinder head Identification.

I have bought an Atlas engine  ( I think ) with a head that I can't identify.

It has 32mm inlet tracks. with !.5" valves

Rocker oil feed is on the side of the head.

A casting number of 23166 and a "V" stamped on the top of head.

The 3 stud holes in the head are 3/8"

It's also had an external oil drain conversion  

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I think thats an Atlas head that has been modified. Looks about as rough as the casting on our  Atlas. Surely  a reject rescued from the scrap bin  to complete  a bike  while the casting supplier gets his act together ,  or not,  when you consider the porus  Commando heads that followed.

 


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