Location: slower lower Delaware,second home on lake Conesus in NY. keep a 93&94 vxr pro there.
I've not done one. But from what I know it wouldn't be cost effective. You'll need a strong press, and 2 special jigs. 1 for disassembly, 1 for reassembly. You'll also need a welder to weld it once assembled. Then it's got to be true straight when all finished. If not it's a useless paperweight.
I have all but the jigs and to me it just wouldn't be cost effective to do.
About the only thing a shop will have is a 20ton press and a dial indicator. You will spend hundreds on v blocks, fixtures to get it true and the webbing's aligned correctly. Then your looking at the actual rebuild kits them selves. Unless your going to be doing it as a business, or on a very regular basis, the investment is not worth it.
Mind boggling the prices of PWC parts.
My other hobby is a 600hp Buick Grand National. I put a forged 4340 crankshaft in her awhile back. I believe I paid $600. I know that didn't include connecting rods but to think a Yamaha OEM equivalent is close to $1K …. Crazy.