I'm asking this for my friend who just bought a 1980 Sachs Seville. It accelerates really well, but it seems to bog down around 27 mph. Seems like it could and should go faster since the speedometer goes up to 40 and the previous owner said he was able to "peg the needle". It hadn't been run in a year, so maybe it needs some carb cleaning? It's oil-injected, but I'm not so sure we can trust that the injector is working. It's leaking oil everyonce and a while from somewhere on the ped. Also, the exhaust fumes are always white, which I thought probably wasnt a good thing.