> No replacement for displacement
I'm with you 99% there, but I have a limited budget and really kinda need to save up for another cage if mine dies.
So instead of spending ~$6k for a used 950, I can save up $800 or so by Feb/Mar and get some performance mods done to the existing 650.
I suspect to get anything resembling real performance output from the bike, I'd have to replace the carbs as well as pipes+custom airbox+jetting. By which point you're in for at least a couple grand, and arguably better off scrapping the idea and starting with more displacement anyhow (or going batshiat crazy and doing the whole extreme-redesign thing, to make it a completely custom ride.)
If it was a project bike and I had someone in the area willing to work with me, I'd consider boring/stroking it out to ~750cc; but really, it's my only bike and my daily rider - so I need it to be reliable.
Long term goal is to save up for an 1800 Valkyrie or an Indian, by which time (~5 years) they will prolly have come out with something even more amazing
Short term, I will prolly start with slip-ons like the fishtails and see how it goes. I'd really like the bike to breathe better, but there are other things to spend $$$ on...