Vintage Karting Forum

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VIDEO - Simplex Mark IV (original survivor) and what appears to be dual WB580s. (starts at 1:25 mark)...

https://vimeo.com/97051068

1960 GKCA Eastern Regional Championships (Race Program), Dart Kart Speedway, Mansfield, Ohio. Program ad. (Hasselbach Collection).

Simplex Challenger MK IV...
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Simplex Challenger ad (Hot Rod magazine - February 1960)...
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