I have the bike up and running finally.
The carbs are still pretty shaky, but the bike starts (more on that later...), and after some coaxing it will idle. Took it off the center stand shifted into gear, and took it for it's first spin. Just a short loop around the backyard.
Bogs down horribly at 4k, but it got better as the bike warmed up. Managed to slip the clutch at around 4k and get her moving - then the carbs caught up to the fuel supply RPMs jumped to 8k and I almost launched it into the bushes
. Dang near crashed it on takeoff - pulled the clutch and saved the takeoff. That v4 has a ton of torque, but it's also incredibly smooth. I can see why people love these v4 bikes. A few spins around the grass and I stabled it - 5 years of sitting idle was beginning to burn off the pipes and it smoked like a fiend. Plus the start up concerns me.
About that start up.
Key on, clutch in, choke on, turned the key. <Thunk> "hmmm" try again <Thunk> I opened it WOT on a lark, starter turns once, twice, <BANG!>. Very loud metallic bang. <Thunk> <Thunk> starter still not turning, WOT <Rrrrrrr ROAR!!> fires up and runs like nothing happened.
All signs point to a hydrolock I my mind. Except I don't know why that would be. Gas seeping from the tank into the cylinder? Fuel supply is off, but those vacuum petcocks aren't as tight as gravity feed petcocks are. When it cools down I'm going to do a compression check in the off-chance I just bent a valve or God forbid holed a cylinder. If nothing is amiss, then perhaps that was just the starter clutch releasing? Scared the heck out of me - but it doesn't appear to have affected the running of the bike.