Long time Harley rider here. I've had everything from 96" Shovels to 120" long rod Evo's. I have used every S&S carb from Super B's to Super D's and 42 and 45mm Mikuni's. However the best carb I ever used was believe it or not a CV. Check out woodcarbs.com The guy is a former Funnycar racer that builds CV carbs for Harleys. I have never had better throttle response or made more power than with his CV carbs. In 2005 I switched to Triumphs, first a Rocket III and now a Thruxton. I noticed that all the guys who are serious about making power in a Triumph dump their CV's. I am wondering if similar mods could be made to the carbs on our Triumphs and maybe end up with a better carb. After all the first thing most Harley guys do is throw their stock CV in a box and buy someting else when they actually have a superior carb already on the bike. It just needs a few mods. Go check out Bob Wood's website it has dyno comparisons ect.