As far as the fluids go, drain all oil, grease, and diff fluids. Refill with something cheap, run it for a few minutes (watching closely the temp and oil pressure), shut it down, re-drain everything, fill with normal lubes and go ride for 15 minutes. Check your fluids for any sign they don't look the same as when you poured them out of the bottle. Any change probably indicates there's still water in there. If so, drain, fill, repeat. Until your oil/diff fluid doesn't look funny anymore. It's a proven system we've used many times over the years. GOOD LUCK!