This is from the site Bring a Trailer (https://bringatrailer.com/) ...
This 1971 Honda CT90 is powered by an 89cc four-stroke single paired with a dual-range four-speed semi-automatic transmission and finished in red with grey plastic trim panels. Additional features include a chrome engine guard, a luggage rack with a detachable passenger seat, and folding handlebars. An oil change was completed in December 2019, and a new battery was installed in the months before. This CT90 was purchased by the seller in December 2019 after previous ownership by collector in Pennsylvania, and is now offered no reserve with transferable New Hampshire registration in the seller’s name.
Red paint covers the frame, fenders, swingarm, chain guard, and under-seat fuel tank, while the side covers, airbox, and frame cover are finished in grey. A detachable buddy seat mounts to the chrome luggage rack and can be viewed in the gallery below.
Wire-spoke 17″ wheels wear older 2.75-17 on/off-road knobby tires, and braking is from drums front and rear. The bike is believed by the seller to have undergone refurbishment while with its previous owner, though supporting documentation is unavailable.
The headlight bucket houses an 80-mph speedometer with 3,500 miles showing on its five-digit odometer. A lever positioned over the riser clamps allows the handlebar to be folded down for storage or transportation. Turn signals are not equipped, although a “winker” indicator is included in the speedometer.
The air-cooled 89cc single sends power to the rear wheel by way of a four-speed, dual-range semi-automatic transmission and a final drive chain. The engine oil was changed in December 2019, and the battery is said to have been replaced within the prior six months. A rubber engine case cover has been installed and can be viewed in the gallery below.