This is from the site Bring a Trailer (https://bringatrailer.com/) ...
This 1972 BSA B50T was purchased by the seller two years ago and has since reportedly since been used for trail rides in the Blue Ridge mountains of North Carolina. The bike is powered by a 499cc OHV single paired with a 4-speed transmission and has been updated with an electronic ignition and a new 21″ front wheel. An oil change was carried out two months ago. This B50T is sold with a North Carolina title in the seller’s name.
Developed as the successor to the 441 Victor, the B50T was the dual sport variant of the B50 and featured an aluminum fuel tank, motocross-style handlebars, knobby tires, and a high pipe. This example features black trim on its polished tank and side covers as well as chrome fenders. The seller notes a ding in the rear fender, and other blemishes are shown up close in the gallery below.
The front wheel has been replaced with a new 21″ wheel, reportedly due to the difficulty of sourcing stock-size 20″ tires. Both chrome wire-spoke wheels are fitted with Kenda dual sport tires.
The motocross-style handlebars feature an updated headlight switch and a mounting bracket for a GPS unit or roll chart. Instrumentation is limited to a speedometer and odometer, with the latter showing 6k miles. Approximately 700 miles have been ridden by the seller, and total mileage is unknown.
The 499cc OHV single produced 34 horsepower in stock form and is paired with a 4-speed transmission. Features include a 30mm Amal concentric carburetor, oil-in-frame construction, and a compression release to aid with kick starting. The seller performed an oil and filter change two months ago, while records of prior service are unavailable.