This is from the site Bring a Trailer (https://bringatrailer.com/) ...
This 1956 MV Agusta CSTL was purchased three years ago by the seller from a Southern California collector. Power is from a 175cc 4-stroke single with a 4-speed transmission. The most recent work is said to have included cleaning the engine case and reupholstering the seat as well as installing a new battery, chain, muffler, and front tire. This MV Agusta is sold with a clean California title in the seller’s name.
The TL designation stood for “Touring Lusso” and featured a dual seat and fishtail muffler. The seat has been reupholstered, and the muffler replaced with an Emmevi item. Chrome Radaelli rims wear a newer tire up front and an older Pirelli in the rear.
The fuel tank wears faded black and red paint and shows its age through assorted dings, corrosion, and paint loss. The decals are worn, and the seller notes that the gas cap seal leaks. A frame-mounted air pump is shown above. A walk-around video has been provided by the seller, with a second viewable below.
The headlight shell contains the ignition and headlight switches as well as a 120-mph CEV speedometer. The odometer shows 208 miles, with total mileage unknown.
The 172cc overhead-valve single was the first 4-stroke offered by MV Augusta and produced eight horsepower in stock form. A 4-speed transmission with a right-side rocker shift transfers power to the rear wheel via a chain drive. The most recent work reportedly included replacement of the battery and chain as well as cleaning the engine case, though no service records are available. A second walk-around video with the engine running is provided below.