This is on my KZ750 but figured I'd ask the group here as well. Putting it back together for the season and have tracked down a leak between the carb holders and cylinder head while tuning. I know it's best to replace but mine are unobtainium part number 16065-1046. Took me a year to find NOS intake ducts but no luck on these whatsoever. Any suggestions on what I can use to seal these up to the cylinder head? I removed them without an issue when I redid the head and they are in good shape but hardened on the head side therefore causing them to leak when installed and torqued dry. I searched but got varying answers on it.