Top End Kits by Jeff Henise

Here are photos of some great racing kits for historic two strokes by Jeff Henise. Learn More »

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Broad band power for the Kawasaki A7 350 rotary valve twin

August 4, 2014   Expansion Chambers, Kawasaki, Kawasaki A7

The Kawasaki A7 Avenger 350 cc rotary valve 2-stroke twin is a fun little bike.

I was surprised to find how quick these things are, and do hear they were very progressive for their time!

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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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