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Sleeper: A 2016 Ducati Scrambler heavily modified by Zero Motorcycles engineer Tom Zipprian

Sleeper: A Ducati Scrambler tweaked by a Zero engineer

A lot of folks who work at American motorcycle manufacturers are compulsive tinkerers. Indian’s design head, Ola Stenegärd, has been building choppers since forever. And Brad Richards of Harley-Davidson always has something sweet on his workbench. Tom Zipprian is a mechanical engineer at California’s Zero Motorcycles—and he too likes to fill his precious downtime with…