How well it might run, depends on how long it has sat without use, or being serviced. Most older Rivarossi's need torn appart, all the old hard and congelled grease removed, and relubed prior to being run regularly again. When I get them, they will run, but usualy noisy and with a bit of jerkness. While some of the jerkiness is from the older 3 pole motor, most is dried up grease or lack of oil on bearings. DO NOT take a Rivarossi motor appart, they have ball bearings in them that are not sealed, if you take it appart, the mini balls go everywhere and your done. Take a good 9v battery with you and a jumper lead with alligator clips on both ends, makes an excellent tester to see if the engine will run, so you can look for problems with the side rods, valve gear or drive gears. Cheers MIke