All Photos Courtesy of Fritz Krupin. Click on any of the images for a High Quality Full Screen Shot.

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There is a water cooled Yamaha 340 with Yamaha pulse fuel injection in the 72.

Fritz took fifth place at the 1 mile track in West Allis, WI. against all the factory teams. Not too bad. He was racing his 650 Thunder Jet.


This is pre Sno*Jet days in the Open Class. That's Fritz on the Arctic Cat. It had a Hirth 650 Red Baron engine it and did quite well.