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This story is not about Duff's karting days but this experimental kart was like squeezing an Allison V-12 in a hot rod. Duffy had to trust the Austrian Puch 250cc two-stroke was scatter-proof for obvious reasons. "I've never heard of anyone before or since building a front engine kart," says Duff, "I removed the gears except for the top gear. We weren't allowed to have a gearbox in those days."