This is from the site Bring a Trailer (https://bringatrailer.com/) ...
This 1966 BMW R50/2 motorcycle is a numbers-matching bike designed from the factory for sidecar use with sidecar mounting points built into the frame and an Earles fork. The seller purchased the BMW approximately 10 years ago and rode it for several years before sourcing a compatible Duna sidecar. He sent the sidecar to Wayne Carini’s F40 Motorsports for restoration and had it painted to match the BMW. Shortly after the restoration was completed the seller was involved in a serious accident on another motorcycle and hasn’t ridden since. The motorcycle and sidecar combo were never ridden, and four years later the seller has opted to sell so the next owner can enjoy them.
The bike was restored prior to the seller’s purchase and remains in excellent cosmetic condition. The black paint is very nice with only minor patina and the dual Pagusa solo seats provide a great look. The chrome is in good shape with some minor wear around the speedometer trim ring.
The sidecar is a Hungarian built Duna model from the early 1960s. The bodywork is aluminum for light weight and features distinctive “rocket-nose” styling. The bodywork and seat was restored to a high standard and remains in as-restored condition, having been in indoor storage since the work was done. While the sidecar is currently mounted to the bike the seller recommends it be taken to an expert before riding, as careful alignment is needed to keep the bike and sidecar stable.
The 500 CC BMW flat twin is original to the bike, with matching numbers on the motor casing, frame, and data plate. The fuel tank is believed to be original as well. While the bike hasn’t been ridden in the past four years the seller runs it on a regular basis to prevent the fuel system from deteriorating due to lack of use.
The bike shows 40k miles on the odometer, though there is no way to verify that the mileage is correct.
The bike is sold with a bill of sale and the Connecticut registration, as the state doesn’t issue titles for vehicles more than 20 years old. The sidecar is attached but not set up or aligned for road use. The bike runs well but the combo will need some adjustment to be safe and usable.