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1) How many bypass holes on a SBN38? I am rebuilding some very corroded carbs on a stock Yamaha '98 dual carb superjet (SBN38's). I only see 2 bypass holes (plus the outlet on the engine side of the butterfly) but the corrosion could be hiding some. I would like to confirm there are only 2...

I consider myself a reasonable mechanic but new to Jetski's. I inherited a 1998 Yamaha Superjet 701, 62T cases, 61X cylinders and 64U head. I am the second owner, I believe the engine has never been apart. The ski sat in my yard unused since 2006, but used to run with no known issues. I am...