Checking out this 55 year old Triumph barrel for the @thompsonscycles land speed racer. Whether the barrels are Old or New, making sure the bores are perpendicular to the base is good practice before the boring job, especially on a racing engine where correct clearance and balance leads to more hp! The co-ax indicator used for finding the center is a neat tool, it can also be used for verifying if the bores are perpendicular to the base.. #alpracingengines #preunit #topfueltriumph | Alp Racing &

Triumph Pre-Unit TR6 Trophy 650cc 1958

Triumph Tuning Guide