I have a '77 GL1000. I've had the carbs apart so many times i worn out the float bowl treads. Be sure check the plenum gasket between the 2 halves of the carb banks. I've had 2 go bad because of the ethanol in today's fuel, you will get an intake runner "ice up" and the plug will fowl. Always use the original air filter not a K&N or foam filter otherwise you will suffer from a "flat spot" at about 3500 RPM when accelerating.