In 1973 the Guinness Book of World Records awarded EJ Potter’s V8 Dragbike “Widowmaker 7” the coveted title of “World’s Fastest Motorcycle”, finally making official what many in America already knew when they dubbed him the “Michigan Madman“.
There was nothing Potter wouldn’t do to go faster – including removing his clutch entirely because he was losing too much power due to it slipping. He’d built the clutch from a Harley-Davidson drum brake, and although he’d tried to make it as strong as possible, it just couldn’t handle the 500+bhp Chevrolet V8.
Widowmaker 7 is fitted with a stressed-member Chevrolet small-block 350 cubic inch (5.7 litre) V8 with Crane gear-driven roller cams and rockers, Brodix aluminium heads, 12.5:1 forged pistons, a 1960s Vertex Len Hughes-built magneto, and Kinsler-rebuilt Hilborn fuel injection.
https://silodrome.com/ej-potter-v8-dragbike-widowmaker-7/
http://www.bonhams.com/auctions/23804/lot/284/?category=list&length=100&page=2
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