You don't have to customize them, they work best stock, well the horn/kill switch thing sucks, as does the condenser location, but overall they are just different, rather than bad. Engine mounts are bad wear items as well. For a stock bike to me nothing better, but to each their own, my Honda Pa-50II is quicker (off the line) has more potential to modify, but does not handle like the Motobecane, it has never given me an issue, but nowhere near as sexy as the 50v. :) There are many parts avail for Motobecanes, between treats and the buy sell forum here you should be able to get all you need, e-bay of course. There is a CDI for Moby as well if you want to go that route.