Hi all, I am very tempted to upgrade my carb to an FCR, to increase throttle response, maybe a little power but not expecting miracles. Currently the bike has an FMF powerbomb header, Yoshi RS3 end can, 3x3 and jetting sorted. Have also taken the time to remove all the "smog reduction" crap that we have from the factory over here. Anyway I digress... In the future I intend on doing a 440 big bore with +2mm crank, I think that makes 450? The question is if I get a 39mm carb now will this work fine with this size of BB or if the 41mm would be best? Would like to add a little something to the bike in the mean time whilst I save for the rest of the parts, the intention being : BB, MRD, cams, valves, springs, crank, MCCT, and whatever else catches my eye, ha ha. There are big plans, but they involve big bucks, so gotta start saving my pennies.