This is from the site Bring a Trailer (https://bringatrailer.com/) ...
This 1957 Ducati 175 Sport was the first production model from the manufacturer to be equipped with a bevel-driven, overhead-cam engine and weighed just 229 pounds dry. This example was acquired by the selling dealer seven years ago and has since received rebuilds of both its engine and transmission. The bike is finished in a factory-style red and gold scheme and is equipped with a Giuliari seat, drum brakes, Pirelli tires, a contoured “jelly mold” fuel tank, and an electronic ignition conversion. This Ducati 175 is now offered on a bill of sale in Indiana with records of the engine rebuild.
The bike has been repainted in the current red-and-gold scheme and features a Giuliari tandem seat, peashooter-style exhaust, hydraulic telescopic front forks, and a “jelly mold” tank. It retains front and rear lighting along with a license plate mount.
Replacement exterior hardware includes the fuel tank cap, fuel tank badges, and taillamp assembly. The bike is equipped with mechanical drum brakes, and the wire-spoke wheels are fitted with Pirelli tires.
Controls are mounted to a set of low clip-on bars, and a steering friction damper is affixed to the upper triple clamp. The seller notes that the ignition switch and keys, handlebar switch, and rear brake switch were replaced under his ownership. The 100-mph speedometer features a five-digit odometer showing 70 miles, though true mileage is unknown.
The air-cooled 175cc single-cylinder is paired with a 4-speed transmission and chain drive to the rear wheel. The engine was factory-rated at 14 horsepower at 8k rpm. The seller commissioned an engine and transmission rebuild by Syd’s Cycles in St. Petersburg, Florida, which included the following:
- Piston, rings, wrist pin, clips
- Custom one-off cylinder sleeve
- Big-end connecting rod rollers
- Lower tower gears
- Gasket seal kit
- Crankcase control valve
- Electronic ignition conversion
- 12-volt alternator, regulator and rectifier
- 12-volt coil, bracket hardware, and ignition plug wires
- Clutch plate and springs
- Ignition switch and keys
- Spark plug
- Fuel petcock and line
A cold-start video is viewable above, and three riding videos are viewable below.