Photo: Zero SR electric motorcycle

The Zero SR is Zero Motorcycle’s top of the line electric bike with a maximum range of 185 miles (with optional Power Tank), a top speed of 102 mph and a starting price of $17,345.  (Myung J. Chun / Los Angeles Times)

The Zero SR is powered by a clutchless direct drive electric motor with a belt final drive. It has the equivalent of 67 horsepower.  (Myung J. Chun / Los Angeles Times)

The Zero SR is powered by a clutch-less direct drive electric motor with a belt final drive.  (Myung J. Chun / Los Angeles Times)

The Zero SR is Zero Motorcycle’s top of the line electric bike with a range of 151 miles of city riding. That range can be extended to 185 miles of city riding with the optional Power Tank.  (Myung J. Chun / Los Angeles Times)

The Zero SR is Zero Motorcycle’s top of the line electric bike.   (Myung J. Chun / Los Angeles Times)

The electric Zero SR is fitted with Showa forks and shock and J. Juan brake calipers. It rides on Pirelli Diablo Rosso II tires.  (Myung J. Chun / Los Angeles Times)

Zero SR is Zero Motorcycle’s top of the line electric bike. It joins three other bikes in the company’s lineup -- the S, DS and FX. The SR has a starting price of $17,345.  (Myung J. Chun / Los Angeles Times)