Performance oriented build doesn't mean that the bike isn't a street bike. The build this guy is doing is definitely not a drag bike type build. The 34s offer outstanding performance throughout the rpm range and after personal testing, I really like the way they run compared to VM29s... throughout the rpm range... If the guy is interested in performance carbs, he can stick some 33 smoothbores on his bike but will not have much luck tuning at idle and will probably go crazy with flat spots. The CV carbs were not used just because of smog considerations but performance as well as they are capable of flowing a lot more air/fuel than the round slide carbs. Round slide carbs will work fine if he wants to use them, I was just giving MY personal favorite... I have tested about EVERY conceivable carburetor that will fit on a 650 (or 900/1000) and I probably like the BS32 the best for a stock 900. They work just SUPER across the rpm range and are so much sweeter than smoothbores, I probably ride them 3 times as far when road testing. The 34s are a bit on the big side for a stock 900 and need to be tuned carefully... If you have performance cams, the extra air/fuel will make a nice hit over the 32s but stock cams don't need more than the 32s can provide. I mentioned the 34s are they are far more readily available as the choke conversion from Suzuki BS series carbs is very painful... (if you want to put a Kaw style know choke on).
