A.J.'s Photos

Bronze flywheel for Triumph racing engine (See progress on this engine)

Workshop with Triumph and Ariel Square Four Engines being re-built

Rare 600 c.c. Square Four Push Rod Engine

Square Four Push Rod Engine

Square Four 600 c.c. Push Rod Engine and Case

1930 500 c.c. OHC Square Four Engine

Square Four Mark II Engine

750 c.c. Stroker Engine built by A. J. Lewis

Porting and Polishing

Porting and Polishing a BSA head

Cutaway picture of Square Four Engine - Below same engine from the article in the October 1951 issue of Cycle magazine.

Engines Part II - Triumph Racing Engine

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