Category Archives: Machine Tools

Rebuild of a single cylinder press-pin crankshaft – How I do it.

January 23, 2017   AHRMA, GP200, Machine Tools, Technical Article, The Machine Shop, Yamaha

A step by step explanation of how I rebuild simple crankshafts. -Jeff Henise

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The Highwayman F37 a custom, purpose-built vintage road racer, Part I

September 18, 2014   AHRMA, Expansion Chambers, Featured, GP200, Kawasaki F3, Kawasaki F7, Machine Tools, Metal Fabrication, Welding

This story highlights the creation of a road race engine from the fusion of two different enduro motors, as well as the design and fabrication of a custom racing chassis to house the “franken-motor.”

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Expansion chambers for an airplane!?

August 4, 2014   Colomban Cri-Cri, Expansion Chambers, Machine Tools, Metal Fabrication, Technical Article, Welding

When I got a call to make a set of expansion chambers for “The world’s smallest manned twin engine airplane” I just could not resist!

The Colomban Cri-cri (or Cricket) was designed in the early 1970’s by Michel Colomban. Since then many renditions have been built. Most Cri-cri aircraft are powered by two single-cylinder 2-stroke engines making 9-15 HP each. However this Cri-cri is special in that it has two twin-cylinder 2-strokes as the power plants!

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