Re: Thoughts on centrifugal & pull start
Oops you also asked about advantages to pull-starters and centrifugal clutches...
The pull-starter would allow you to crank the engine more easily in cold weather (you can crank it and then go back inside to let the engine warm up without having to pedal around). That's the reason I bought one. I'll probably take it off again when it warms up in a few months (*IF* it ever gets warm outside again).
I don't have a centrifugal clutch, but from what I understand, it allows you to pay less attention to your clutch lever. For example, when you slow down to a stop, you wouldn't need to pull in the clutch in order to keep the engine from stalling.