This is from the site Bring a Trailer (https://bringatrailer.com/) ...
This 1977 Honda CB550K was purchased by the seller a year ago in stock condition and modified as a custom cafe-racer over a subsequent eight-month period. The factory bodywork was removed, and a modified CB500T fuel tank and custom seat pan were fitted along with clip-on handlebars and rearsets. Power is from a 544cc overhead-cam inline-four featuring rebuilt carburetors, velocity stacks, and a 4-into-1 exhaust system, while shifting is through a 5-speed transmission. The seller estimates that just over 100 miles have been added since completion of the build, which was named Balios and documented on social media as well as being featured on pipeburn.com. This custom CB550 is offered with a clean Georgia title in the seller’s name.
The modified CB500T fuel tank is finished in a BMW dark metallic blue, which the seller describes as appearing black except in bright light. The fenders were removed, and the custom-formed seat pan is upholstered with faux leather. An enclosure containing a Shorai lithium battery and other electrical components was reportedly fabricated as a stressed frame member.
The license plate and an LED tail light with integrated turn signals are mounted below the seat pan. The drive chain was replaced, and stock shocks fitted. Chrome wire-spoke wheels wear new Avon Road Rider tires. Tarozzi rearsets are affixed to Cognito Moto mounts. Brake work included rebuilds of the master cylinder and front caliper as well as installation of new pads, stainless steel hoses, a drilled front disc, and a Cognito Moto rear linkage.
Adjustable Tommaselli clip-on handlebars wear faux leather-wrapped grips and house stock switchgear. New throttle and clutch cables were installed along with tapered steering head bearings, and the relocated ignition switch and aftermarket speedometer are isolated with rubber mounts. The headlight is an HID unit that incorporates LED turn indicators.
The single overhead-cam 544cc inline-four produced 38 horsepower in stock trim and is paired with a 5-speed transmission. The case and other aluminum components were cleaned, vapor blasted, polished, and coated. The carburetors have been rebuilt, re-jetted, and tuned to work with velocity stacks and a Delkavic 4-into-1 exhaust.
A cold start video is provided above, with additional clips viewable on the seller’s YouTube channel.