I took it for a short ride to see what it was like. First impressions are good, but there is a carburation issue at 3500rpm. This model is known for that as it has a twin choke Dellorto system from a car. I think this type of carburettor was chosen as it is quite shallow and self-contained. This is required as the exhaust system passes under the carburettors so there is not much room. In addition, they were jetted very lean by the factory so they are very cold blooded and this hesitation at 3500rpm seems common.
I will disassemble the carburettor at some point and check the pilot and main jet sizes.
I did this to the other Atlas I just sold and it made a big difference. I increased the pilots from 58 to 65 and the main jets from 152 to 165.