I recently ordered some diaphrams for $20 each from www.jbmindustries.com (http://www.jbmindustries.com) for my Yamaha XJ650 RJ, and I cannot reccomend these products highly enough. Ordering was simple, communication great, postage cheap, and the bike purrs like a kitten, solved a lot of nigling carburetor issues like hanging idle, uneven running etc.
next I will be ordering a set for the FJ1100.
Give the website a look, much cheaper than NOS or aftermarket.
cheers, Gareth