Both are good mods, personally I like a open clutch cover and you can design it yourself and fabricate it. Oh, and cost nothing.... If you have the tools 
Only a few hoursno Retro, its not what you need, its for the bike man!!! One of my friends tried viagra ( he is 29) his girlfriends old man gave it to him- what a guy huh? Said it started to hurt after a few hours....